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256 vulnerabilities by Arista Networks
CVE-2026-73462 (GCVE-0-2026-73462)
Vulnerability from nvd – Published: 2026-09-16 19:01 – Updated: 2026-09-17 18:31
VLAI
EPSS
VEX
Title
On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the I
Summary
On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the IGMP snooping agent to terminate unexpectedly. This results in a temporary disruption of multicast traffic management, which may cause multicast traffic to be flooded to all ports of the affected VLAN until the service recovers. Repeated exploitation could result in a prolonged loss of intended multicast forwarding behavior.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 18:31 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0 , ≤ 4.36.1F
(custom)
Affected: 4.35.0 , ≤ 4.35.5M (custom) Affected: 4.34.0 , ≤ 4.34.7.1M (custom) Affected: 4.33.0 , ≤ 4.33.8M (custom) |
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CVE-2026-73457 (GCVE-0-2026-73457)
Vulnerability from nvd – Published: 2026-09-16 18:57 – Updated: 2026-09-17 18:32
VLAI
EPSS
VEX
Title
Under certain circumstances, the gNPSI client credentials might be logged in clear text, in local or remote accounting logs to authenticated users.
Summary
Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, the gNPSI client credentials might be logged in clear text in local or remote accounting logs to authenticated users.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 18:32 UTC
CWE
- CWE-532 - Insertion of Sensitive Information into Log File
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0 , ≤ 4.36.1F
(custom)
Affected: 4.35.0 , ≤ 4.35.5M (custom) Affected: 4.34.2F , ≤ 4.34.7M (custom) |
Date Public
2026-09-09 18:55
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"value": "\u003cp\u003eTo secure the agent against\u0026nbsp; CVE-2026-73457, the service must be configured to use \u003ci\u003emutual TLS\u003c/i\u003e and only\u003ci\u003e x509-spiffe \u003c/i\u003eauthentication must be enabled.\u003c/p\u003e\u003cpre\u003emanagement security\n\u0026nbsp;\u0026nbsp;\u0026nbsp;ssl profile P1\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;certificate server.crt key server.key\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;trust certificate ca_client.crt\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;chain certificate ca_signing.crt\n!\nmanagement api gnpsi\n\u0026nbsp;\u0026nbsp;\u0026nbsp;transport grpc t2\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;ssl profile P1\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;port 7001\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;authentication username priority x509-spiffe\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;no disabled\n\u003c/pre\u003e\u003cdiv\u003e\u0026nbsp;\u003c/div\u003e\u003cp\u003eLogs are disabled by default, including the affected facility \u003cb\u003eEosRpcAuth\u003c/b\u003e.To mitigate CVE-2026-73457, ensure the facility \u003cb\u003eEosRpcAuth\u003c/b\u003e status is set to disabled. The command below can be used to restore all Gnpsi agent tracing to its default setting.\u003c/p\u003e\u003cpre\u003eswitch(config)# no trace Gnpsi setting\n\u003c/pre\u003e\u003cdiv\u003e\u0026nbsp;\u003c/div\u003e\u003cp\u003eShould it be determined that sensitive information has been logged, the affected log files must be truncated and any compromised secrets rotated to prevent gNPSI client credentials leaking.\u003c/p\u003e\u003cp\u003eUse the following commands to clean up Gnpsi log files:\u003c/p\u003e\u003cpre\u003eswitch(config)# bash sudo truncate -s 0 /var/log/agents/Gnpsi*\n\u003c/pre\u003e\u003cdiv\u003e\u0026nbsp;\u003c/div\u003e\u003cp\u003eThen use the following commands to clean up previously rotated old log files:\u003c/p\u003e\u003cpre\u003eswitch(config)# bash sudo find /var/log/agents -name \u0027Gnpsi*.gz\u0027 -type f -delete\u003c/pre\u003e"
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CVE-2026-73456 (GCVE-0-2026-73456)
Vulnerability from nvd – Published: 2026-09-16 18:54 – Updated: 2026-09-17 11:39
VLAI
EPSS
VEX
Title
Under certain circumstances, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised switch.
Summary
Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised switch.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 03:57 UTC
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0 , ≤ 4.36.1F
(custom)
Affected: 4.35.0 , ≤ 4.35.5M (custom) Affected: 4.34.2F , ≤ 4.34.7M (custom) |
Date Public
2026-09-09 18:52
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CVE-2026-73443 (GCVE-0-2026-73443)
Vulnerability from nvd – Published: 2026-09-16 18:47 – Updated: 2026-09-17 18:33
VLAI
EPSS
VEX
Title
On affected platforms running Arista EOS with VRRPv2 IP-AH authentication configured, an unauthenticated attacker within the same layer 2 network segment on which VRRP is running can capture a legitimate authenticated VRRP advertisement and replay it indef
Summary
On affected platforms running Arista EOS with VRRPv2 IP-AH authentication configured, an unauthenticated attacker within the same layer 2 network segment on which VRRP is running can capture a legitimate authenticated VRRP advertisement and replay it indefinitely. Replayed advertisements can be used to advertise stale VRRP state, for example to prevent a backup router from taking over the virtual gateway after the original master has gone down, resulting in a denial of service for hosts using the virtual gateway address.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 18:33 UTC
CWE
- CWE-294 - Authentication Bypass by Capture-replay
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0 , ≤ 4.36.1F
(custom)
Affected: 4.35.0 , ≤ 4.35.5M (custom) Affected: 4.34.0 , ≤ 4.34.7M (custom) Affected: 4.33.0 , ≤ 4.33.9M (custom) |
Date Public
2026-09-09 18:44
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CVE-2026-73442 (GCVE-0-2026-73442)
Vulnerability from nvd – Published: 2026-09-16 18:50 – Updated: 2026-09-17 18:32
VLAI
EPSS
VEX
Title
On affected platforms running Arista EOS with VRRP enabled, the peer device VRRP authentication credentials are logged in cleartext on the switch, allowing an authenticated user with sufficient privileges to view agent trace logs (or a system receiving for
Summary
On affected platforms running Arista EOS with VRRP enabled, the peer device VRRP authentication credentials are logged in cleartext on the switch, allowing an authenticated user with sufficient privileges to view agent trace logs (or a system receiving forwarded log output) to obtain the peer device VRRP authentication credentials without having access to the network segment on which VRRP is running.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 18:32 UTC
CWE
- CWE-532 - Insertion of Sensitive Information into Log File
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0 , ≤ 4.36.1F
(custom)
Affected: 4.35.0 , ≤ 4.35.5M (custom) Affected: 4.34.0 , ≤ 4.34.7M (custom) Affected: 4.33.0 , ≤ 4.33.9M (custom) |
Date Public
2026-09-09 18:48
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CVE-2026-86107 (GCVE-0-2026-86107)
Vulnerability from nvd – Published: 2026-09-16 10:49 – Updated: 2026-09-16 17:45
VLAI
EPSS
VEX
Title
Security Advisory 0180
Summary
The VeloCloud Edge and Gateway exhibit an out-of-bounds write vulnerability when processing tunneled IP fragments between authenticated overlay neighbors. This vulnerability impacts the VeloCloud VCMP tunnel protocol only.
A successful exploit can cause the affected process to terminate and restart, leading to a temporary disruption of traffic. Hosts on the internet that are unauthenticated and unable to form an overlay peer relationship can not trigger the vulnerable logic.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 17:44 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | VeloCloud |
Affected:
1.0.0.0 , < 5.2.0.0
(custom)
Affected: 5.2.0.0 , < 5.2.7.0 (custom) Affected: 6.1.0.0 , < 6.1.5.0 (custom) Affected: 6.4.0.0 , < 6.4.2.0 (custom) |
|
| Arista Networks | VeloCloud Gateway |
Affected:
1.0.0.0 , < 5.2.0.0
(custom)
Affected: 5.2.0.0 , < 5.2.7.0 (custom) Affected: 6.1.0.0 , < 6.1.5.0 (custom) Affected: 6.4.0.0 , < 6.4.2.0 (custom) |
Date Public
2026-09-09 00:00
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CVE-2026-86106 (GCVE-0-2026-86106)
Vulnerability from nvd – Published: 2026-09-16 10:12 – Updated: 2026-09-16 17:53
VLAI
EPSS
VEX
Title
Security Advisory 0179
Summary
An unauthenticated actor with network access to the private HA interconnect may trigger sensitive HA peer functions without verification. This could result in elevated command execution on Edge units where HA is enabled.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 17:52 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | VeloCloud Edge |
Affected:
1.0.0.0 , < 5.2.0.0
(custom)
Affected: 5.2.0.0 , < 5.2.7.0 (custom) Affected: 6.1.0.0 , < 6.1.5.0 (custom) Affected: 6.4.0.0 , < 6.4.2.0 (custom) |
Date Public
2026-09-09 00:00
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CVE-2026-77190 (GCVE-0-2026-77190)
Vulnerability from nvd – Published: 2026-09-16 10:08 – Updated: 2026-09-16 13:26
VLAI
EPSS
VEX
Title
Security Advisory 0177
Summary
On affected platforms running Arista EOS, an unauthenticated attacker who is network-adjacent to the switch and able to connect to a device with PIM Sparse Mode and MLAG configured, can send malformed messages that cause the Pimsm agent to terminate unexpectedly. The Pimsm agent is automatically restarted, but repeated attacks can cause the agent to restart continuously, resulting in a sustained denial of service.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 13:26 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0F , ≤ 4.36.1F
(custom)
Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.34.2F , ≤ 4.34.7M (custom) |
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CVE-2026-73469 (GCVE-0-2026-73469)
Vulnerability from nvd – Published: 2026-09-16 09:55 – Updated: 2026-09-16 13:41
VLAI
EPSS
VEX
Title
Security Advisory 0176
Summary
When specific platforms are using Arista EOS with a loose Unicast Reverse Path Forwarding (uRPF) configuration, certain traffic may not be subjected to the intended verification drop. Consequently, traffic that should be dropped based on these routes could still be processed and forwarded by the device.
This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 13:41 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
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(custom)
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CVE-2026-73468 (GCVE-0-2026-73468)
Vulnerability from nvd – Published: 2026-09-16 09:55 – Updated: 2026-09-16 13:37
VLAI
EPSS
VEX
Title
Security Advisory 0175
Summary
A specially crafted packet can cause the premature expiry of multicast forwarding state on affected interfaces, potentially resulting in temporary multicast traffic loss during the affected period.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 13:36 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
1.0.0 , < 4.33.0F
(custom)
Affected: 4.33.0F , ≤ 4.33.8M (custom) Affected: 4.34.0F , ≤ 4.34.7.1M (custom) Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.36.0F , ≤ 4.36.1F (custom) |
Date Public
2026-09-09 00:00
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CVE-2026-73455 (GCVE-0-2026-73455)
Vulnerability from nvd – Published: 2026-09-16 09:46 – Updated: 2026-09-16 17:56
VLAI
EPSS
VEX
Title
Security Advisory 0173
Summary
On affected platforms running Arista EOS with Open Shortest Path First version 3 (OSPFv3) configured, a specially crafted packet can cause the OSPFv3 agent to restart unexpectedly.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 17:56 UTC
CWE
- CWE-130 - Improper Handling of Length Parameter Inconsistency
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
1.0.0 , < 4.33.0F
(custom)
Affected: 4.33.0F , ≤ 4.33.8M (custom) Affected: 4.34.0F , ≤ 4.34.6M (custom) Affected: 4.35.0F , ≤ 4.35.4M (custom) Affected: 4.36.0F , ≤ 4.36.0.1F (custom) |
Date Public
2026-09-09 00:00
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CVE-2026-73453 (GCVE-0-2026-73453)
Vulnerability from nvd – Published: 2026-09-16 09:46 – Updated: 2026-09-17 03:56
VLAI
EPSS
VEX
Title
Security Advisory 0174
Summary
An unauthenticated P4Runtime (Programming Protocol-Independent Packet Processors Runtime) client can achieve arbitrary code execution under certain conditions on affected platforms running Arista EOS configured with P4Runtime. P4Runtime is disabled by default in Arista EOS. By crafting a malicious packet during the initiation of a P4Runtime session, an attacker can obtain complete administrative control over the compromised switch.
This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 00:00 UTC
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0F , ≤ 4.36.1F
(custom)
Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.34.0F , ≤ 4.34.7M (custom) Affected: 4.33.0F , < 4.34.0F (custom) Affected: 4.32.0F , < 4.33.0F (custom) Affected: 4.31.0F , < 4.32.0F (custom) Affected: 4.30.0F , < 4.31.0F (custom) Affected: 4.29.2F , < 4.30.0F (custom) |
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"value": "\u003cp\u003eThe recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below.\u003c/p\u003e\u003cp\u003eCVE-2026-73453 has been fixed in the following releases:\u003c/p\u003e\u003cul\u003e\u003cli\u003e4.36.2F and later releases in the 4.36.x train\u003c/li\u003e\u003cli\u003e4.35.6M and later releases in the 4.35.x train\u003c/li\u003e\u003cli\u003e4.34.8M and later releases in the 4.34.x train\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eNo hotfix is available for this issue.\u003c/p\u003e"
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"value": "\u003cp\u003eTo mitigate this issue, it is recommended to configure the p4-runtime service in mTLS mode (ssl profile with trust certificates). Additionally, enable gNSI Authz to facilitate RPC authorization via the client certificate SPIFFE-ID. Please note that enabling mTLS config will terminate all existing P4 client connections and may cause control plane disruption since packet I/O operations are impacted.\u003c/p\u003e\u003cp\u003eBefore implementing this solution, the following pre-requisites must be met:\u003c/p\u003e\u003col\u003e\u003cli\u003eGenerate SPIFFE-ID client certificate signed by the server trusted CA and use it for establishing P4 client connection to the server.\u003c/li\u003e\u003cli\u003eDefine a json file with SPIFFE-ID based policies for Authz service and install it on the device using gNSI Authz.Rotate() rpc.\u003c/li\u003e\u003c/ol\u003e\u003cpre\u003eswitch\u003eshow running-config section p4-runtime\np4-runtime\n no shutdown\n !\n transport grpc foo\n ssl profile campus\n authentication username priority x509-spiffe\u003c/pre\u003e\u003cpre\u003eswitch\u003eshow running-config section security\nmanagement security\n ssl profile campus\n certificate server.crt key server.key\n trust certificate ca.crt\u003c/pre\u003e\u003cpre\u003eswitch\u003eshow running-config section gnsi\nmanagement api gnsi\n service authz\u003c/pre\u003e"
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"datePublished": "2026-09-16T09:46:33.548Z",
"dateReserved": "2026-08-12T16:42:47.921Z",
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CVE-2026-73440 (GCVE-0-2026-73440)
Vulnerability from nvd – Published: 2026-09-16 09:55 – Updated: 2026-09-16 13:40
VLAI
EPSS
VEX
Title
Security Advisory 0178
Summary
On affected platforms running Arista EOS with Simple Network Management Protocol (SNMP) configured, SNMPv3 local or remote user credentials may be exposed as a one-way hashed, localized key value within the device's running and sanitized configurations. An authenticated user who gains access to this sensitive information could leverage it to perform unauthorized read operations on SNMP tables or to send fraudulent trap notifications to the Network Management System (NMS).
This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 13:40 UTC
CWE
- CWE-212 - Improper Removal of Sensitive Information Before Storage or Transfer
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0F , ≤ 4.36.1F
(custom)
Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.34.0F , ≤ 4.34.7.1M (custom) Affected: 4.33.0F , ≤ 4.33.9M (custom) Affected: 1.0.0 , < 4.33.0F (custom) |
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"value": "\u003cp\u003eIn order to be vulnerable to CVE-2026-73440, the following conditions must all be met:\u003c/p\u003e\u003cul\u003e\u003cli\u003eSNMPv3 must be configured with at least one local or remote user that has an authentication key.\u003c/li\u003e\u003cli\u003eThe SNMPv3 user CLI configuration uses the legacy syntax and does not include the updated \u0026quot;key \u0026lt;algo\u0026gt; \u0026lt;encrypted_text\u0026gt;\u0026quot; syntax.\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eFor example:\u003c/p\u003e\u003cpre\u003eswitch# show running-config | section snmp-server\nsnmp-server user alice group_alice v3 localized f5717f2cdde9bb946d00 auth sha256 f4b9ec9a299a10a5dec3541f44f44000484254ee56fa404236730520e10ce689\u003c/pre\u003e\u003cp\u003eTo verify whether any SNMPv3 users with authentication are configured:\u003c/p\u003e\u003cpre\u003eswitch# show snmp user\n\nUser name : alice\nSecurity model : v3\nEngine ID : f5717f2cdde9bb946d00\nAuthentication : SHA-256\nPrivacy : None\nGroup : group_alice\u003c/pre\u003e\u003cp\u003eIf SNMP is not configured or no SNMPv3 users are configured, there is no exposure to this issue:\u003c/p\u003e\u003cpre\u003eswitch\u003eshow snmp\nChassis: XXXXXXXXXXX\nSNMP agent enabled in VRFs: default\nTransmit message maximum size: 65536\nSNMP agent disabled: Either no communities and no users are configured, or no VRFs are configured.\u003c/pre\u003e"
}
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"value": "In order to be vulnerable to CVE-2026-73440, the following conditions must all be met:\n\n- SNMPv3 must be configured with at least one local or remote user that has an authentication key.\n- The SNMPv3 user CLI configuration uses the legacy syntax and does not include the updated \"key \u003calgo\u003e \u003cencrypted_text\u003e\" syntax.\n\nFor example:\n\n switch# show running-config | section snmp-server\n snmp-server user alice group_alice v3 localized f5717f2cdde9bb946d00 auth sha256 f4b9ec9a299a10a5dec3541f44f44000484254ee56fa404236730520e10ce689\n\nTo verify whether any SNMPv3 users with authentication are configured:\n\n switch# show snmp user\n\n User name : alice\n Security model : v3\n Engine ID : f5717f2cdde9bb946d00\n Authentication : SHA-256\n Privacy : None\n Group : group_alice\n\nIf SNMP is not configured or no SNMPv3 users are configured, there is no exposure to this issue:\n\n switch\u003eshow snmp\n Chassis: XXXXXXXXXXX\n SNMP agent enabled in VRFs: default\n Transmit message maximum size: 65536\n SNMP agent disabled: Either no communities and no users are configured, or no VRFs are configured."
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}
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CVE-2026-73438 (GCVE-0-2026-73438)
Vulnerability from nvd – Published: 2026-09-16 09:38 – Updated: 2026-09-16 18:03
VLAI
EPSS
VEX
Title
Security Advisory 0172
Summary
On affected platforms running Arista EOS with Open Shortest Path First version 3 (OSPFv3) configured, an unauthenticated attacker on the same OSPFv3 broadcast domain can send a specially crafted set of packets that can cause the Ospf3 agent to restart unexpectedly. The crash results in the loss of all OSPFv3 adjacencies on the affected device and may disrupt routing across the broader OSPF domain until the agent recovers.
This issue was reported externally by Dravanet Inc., and Arista is not aware of any malicious exploitation of this vulnerability in customer networks.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 17:57 UTC
CWE
- CWE-617 - Reachable Assertion
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0F , ≤ 4.36.1F
(custom)
Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.34.0F , ≤ 4.34.7M (custom) Affected: 4.33.0F , ≤ 4.33.9M (custom) Affected: 1.0.0 , < 4.33.0F (custom) |
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CVE-2026-73436 (GCVE-0-2026-73436)
Vulnerability from nvd – Published: 2026-09-16 09:19 – Updated: 2026-09-16 13:50
VLAI
EPSS
VEX
Title
Security Advisory 0171
Summary
On affected platforms running Arista EOS with OSPFv2 and OSPFv2 segment routing configured, a specially crafted OSPFv2 packet from an adjacent OSPF neighbor may cause OSPF to restart unexpectedly.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 13:50 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0F , ≤ 4.36.1F
(custom)
Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.34.0F , ≤ 4.34.7.1M (custom) Affected: 4.33.0F , ≤ 4.33.9M (custom) Affected: 1.0.0 , < 4.33.0F (custom) |
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CVE-2026-73435 (GCVE-0-2026-73435)
Vulnerability from nvd – Published: 2026-09-16 09:19 – Updated: 2026-09-16 15:29
VLAI
EPSS
VEX
Title
Security Advisory 0171
Summary
On affected platforms running Arista EOS with Open Shortest Path First version 2 (OSPFv2) configured, a specially crafted OSPFv2 packet from an unauthenticated attacker on the same broadcast segment, with OSPFv2 authentication configured can cause adjacency flapping and packet loss. The disruption can affect routing across the broader OSPF domain.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 15:28 UTC
CWE
- CWE-345 - Insufficient Verification of Data Authenticity
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0F , ≤ 4.36.1F
(custom)
Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.34.0F , ≤ 4.34.7M (custom) Affected: 4.33.0F , ≤ 4.33.9M (custom) Affected: 1.0.0 , < 4.33.0F (custom) |
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CVE-2026-19640 (GCVE-0-2026-19640)
Vulnerability from nvd – Published: 2026-09-16 09:11 – Updated: 2026-09-16 13:57
VLAI
EPSS
VEX
Title
Security Advisory 0170
Summary
On affected platforms running Arista EOS, an authenticated user with access to the gNMI (gRPC Network Management Interface) may receive incorrect authorization results, potentially allowing access beyond their currently assigned permissions.
This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 13:55 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0F , ≤ 4.36.0.1F
(custom)
Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.34.0F , ≤ 4.34.7M (custom) Affected: 4.33.0F , ≤ 4.33.8M (custom) Affected: 4.24.0F , < 4.33.0F (custom) |
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"value": "\u003cp\u003eThe vulnerability can be mitigated by performing both of the following actions.\u003c/p\u003e\u003cp\u003e1. Kill gNMI subscriptions after AAA authorization policy changes. Run the following command to kill gNMI subscriptions to OpenConfig/Octa on port 6030. If a different port than the default of 6030 is being used for OpenConfig/Octa, adjust accordingly to that port:\u003c/p\u003e\u003cpre\u003eswitch#bash ss -tnp dport = 6030 | grep -o \u0027pid=[0-9]*\u0027 | cut -d= -f2 | xargs sudo kill\u003c/pre\u003e\u003cp\u003eNote: the port that OpenConfig/Octa is running the gNMI transport on is available in the output of the \u0026quot;show man api gnmi\u0026quot; CLI command (see above under the \u0026quot;Server:\u0026quot; field).\u003c/p\u003e\u003cp\u003e2. Use username and password based authentication (as opposed to mTLS) for gNMI requests to OpenConfig/Octa. The following command is an example using Arista\u0027s gNMI client:\u003c/p\u003e\u003cpre\u003egnmi -username bob -password myPass123 -addr 127.0.0.1 subscribe /system/state\u003c/pre\u003e\u003cp\u003eFor a transport running mTLS, mTLS can be disabled for this transport by any of the configurations described below:\u003c/p\u003e\u003cp\u003ea. Configure the SSL profile to use TLS instead of mTLS. This can be done by removing the trusted certificates from the SSL profile, using the \u0026quot;no trust certificate \u0026lt;name\u0026gt;\u0026quot; CLI command within the SSL profile.\u003c/p\u003e\u003cp\u003eFor example, if an SSL profile has configuration like:\u003c/p\u003e\u003cpre\u003emanagement security\n ssl profile XXY\n certificate x.crt key x.key\n trust certificate A.crt\n trust certificate B.crt\u003c/pre\u003e\u003cp\u003eThen this profile can be changed from mTLS to TLS by removing each of the trusted certificates:\u003c/p\u003e\u003cpre\u003eswitch#configure\nswitch(config)#management security\nswitch(config-mgmt-security)#ssl profile XXY\nswitch(config-mgmt-sec-ssl-profile-XXY)#no trust certificate A.crt\nswitch(config-mgmt-sec-ssl-profile-XXY)#no trust certificate B.crt\u003c/pre\u003e\u003cp\u003eb. Configure the OpenConfig/Octa transport to use an insecure server instead of mTLS, by removing the SSL profile config from the \u0026quot;transport grpc \u0026lt;name\u0026gt;\u0026quot; mode:\u003c/p\u003e\u003cpre\u003eswitch#configure\nswitch(config)#management api gnmi\nswitch(config-mgmt-api-gnmi)#transport grpc default\nswitch(config-gnmi-transport-default)#no ssl profile\u003c/pre\u003e"
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CVE-2026-73462 (GCVE-0-2026-73462)
Vulnerability from cvelistv5 – Published: 2026-09-16 19:01 – Updated: 2026-09-17 18:31
VLAI
EPSS
VEX
Title
On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the I
Summary
On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the IGMP snooping agent to terminate unexpectedly. This results in a temporary disruption of multicast traffic management, which may cause multicast traffic to be flooded to all ports of the affected VLAN until the service recovers. Repeated exploitation could result in a prolonged loss of intended multicast forwarding behavior.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 18:31 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0 , ≤ 4.36.1F
(custom)
Affected: 4.35.0 , ≤ 4.35.5M (custom) Affected: 4.34.0 , ≤ 4.34.7.1M (custom) Affected: 4.33.0 , ≤ 4.33.8M (custom) |
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CVE-2026-73457 (GCVE-0-2026-73457)
Vulnerability from cvelistv5 – Published: 2026-09-16 18:57 – Updated: 2026-09-17 18:32
VLAI
EPSS
VEX
Title
Under certain circumstances, the gNPSI client credentials might be logged in clear text, in local or remote accounting logs to authenticated users.
Summary
Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, the gNPSI client credentials might be logged in clear text in local or remote accounting logs to authenticated users.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 18:32 UTC
CWE
- CWE-532 - Insertion of Sensitive Information into Log File
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0 , ≤ 4.36.1F
(custom)
Affected: 4.35.0 , ≤ 4.35.5M (custom) Affected: 4.34.2F , ≤ 4.34.7M (custom) |
Date Public
2026-09-09 18:55
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CVE-2026-73456 (GCVE-0-2026-73456)
Vulnerability from cvelistv5 – Published: 2026-09-16 18:54 – Updated: 2026-09-17 11:39
VLAI
EPSS
VEX
Title
Under certain circumstances, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised switch.
Summary
Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised switch.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 03:57 UTC
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0 , ≤ 4.36.1F
(custom)
Affected: 4.35.0 , ≤ 4.35.5M (custom) Affected: 4.34.2F , ≤ 4.34.7M (custom) |
Date Public
2026-09-09 18:52
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CVE-2026-73442 (GCVE-0-2026-73442)
Vulnerability from cvelistv5 – Published: 2026-09-16 18:50 – Updated: 2026-09-17 18:32
VLAI
EPSS
VEX
Title
On affected platforms running Arista EOS with VRRP enabled, the peer device VRRP authentication credentials are logged in cleartext on the switch, allowing an authenticated user with sufficient privileges to view agent trace logs (or a system receiving for
Summary
On affected platforms running Arista EOS with VRRP enabled, the peer device VRRP authentication credentials are logged in cleartext on the switch, allowing an authenticated user with sufficient privileges to view agent trace logs (or a system receiving forwarded log output) to obtain the peer device VRRP authentication credentials without having access to the network segment on which VRRP is running.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 18:32 UTC
CWE
- CWE-532 - Insertion of Sensitive Information into Log File
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0 , ≤ 4.36.1F
(custom)
Affected: 4.35.0 , ≤ 4.35.5M (custom) Affected: 4.34.0 , ≤ 4.34.7M (custom) Affected: 4.33.0 , ≤ 4.33.9M (custom) |
Date Public
2026-09-09 18:48
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CVE-2026-73443 (GCVE-0-2026-73443)
Vulnerability from cvelistv5 – Published: 2026-09-16 18:47 – Updated: 2026-09-17 18:33
VLAI
EPSS
VEX
Title
On affected platforms running Arista EOS with VRRPv2 IP-AH authentication configured, an unauthenticated attacker within the same layer 2 network segment on which VRRP is running can capture a legitimate authenticated VRRP advertisement and replay it indef
Summary
On affected platforms running Arista EOS with VRRPv2 IP-AH authentication configured, an unauthenticated attacker within the same layer 2 network segment on which VRRP is running can capture a legitimate authenticated VRRP advertisement and replay it indefinitely. Replayed advertisements can be used to advertise stale VRRP state, for example to prevent a backup router from taking over the virtual gateway after the original master has gone down, resulting in a denial of service for hosts using the virtual gateway address.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 18:33 UTC
CWE
- CWE-294 - Authentication Bypass by Capture-replay
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0 , ≤ 4.36.1F
(custom)
Affected: 4.35.0 , ≤ 4.35.5M (custom) Affected: 4.34.0 , ≤ 4.34.7M (custom) Affected: 4.33.0 , ≤ 4.33.9M (custom) |
Date Public
2026-09-09 18:44
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CVE-2026-86107 (GCVE-0-2026-86107)
Vulnerability from cvelistv5 – Published: 2026-09-16 10:49 – Updated: 2026-09-16 17:45
VLAI
EPSS
VEX
Title
Security Advisory 0180
Summary
The VeloCloud Edge and Gateway exhibit an out-of-bounds write vulnerability when processing tunneled IP fragments between authenticated overlay neighbors. This vulnerability impacts the VeloCloud VCMP tunnel protocol only.
A successful exploit can cause the affected process to terminate and restart, leading to a temporary disruption of traffic. Hosts on the internet that are unauthenticated and unable to form an overlay peer relationship can not trigger the vulnerable logic.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 17:44 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | VeloCloud |
Affected:
1.0.0.0 , < 5.2.0.0
(custom)
Affected: 5.2.0.0 , < 5.2.7.0 (custom) Affected: 6.1.0.0 , < 6.1.5.0 (custom) Affected: 6.4.0.0 , < 6.4.2.0 (custom) |
|
| Arista Networks | VeloCloud Gateway |
Affected:
1.0.0.0 , < 5.2.0.0
(custom)
Affected: 5.2.0.0 , < 5.2.7.0 (custom) Affected: 6.1.0.0 , < 6.1.5.0 (custom) Affected: 6.4.0.0 , < 6.4.2.0 (custom) |
Date Public
2026-09-09 00:00
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CVE-2026-86106 (GCVE-0-2026-86106)
Vulnerability from cvelistv5 – Published: 2026-09-16 10:12 – Updated: 2026-09-16 17:53
VLAI
EPSS
VEX
Title
Security Advisory 0179
Summary
An unauthenticated actor with network access to the private HA interconnect may trigger sensitive HA peer functions without verification. This could result in elevated command execution on Edge units where HA is enabled.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 17:52 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | VeloCloud Edge |
Affected:
1.0.0.0 , < 5.2.0.0
(custom)
Affected: 5.2.0.0 , < 5.2.7.0 (custom) Affected: 6.1.0.0 , < 6.1.5.0 (custom) Affected: 6.4.0.0 , < 6.4.2.0 (custom) |
Date Public
2026-09-09 00:00
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CVE-2026-77190 (GCVE-0-2026-77190)
Vulnerability from cvelistv5 – Published: 2026-09-16 10:08 – Updated: 2026-09-16 13:26
VLAI
EPSS
VEX
Title
Security Advisory 0177
Summary
On affected platforms running Arista EOS, an unauthenticated attacker who is network-adjacent to the switch and able to connect to a device with PIM Sparse Mode and MLAG configured, can send malformed messages that cause the Pimsm agent to terminate unexpectedly. The Pimsm agent is automatically restarted, but repeated attacks can cause the agent to restart continuously, resulting in a sustained denial of service.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 13:26 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0F , ≤ 4.36.1F
(custom)
Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.34.2F , ≤ 4.34.7M (custom) |
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CVE-2026-73468 (GCVE-0-2026-73468)
Vulnerability from cvelistv5 – Published: 2026-09-16 09:55 – Updated: 2026-09-16 13:37
VLAI
EPSS
VEX
Title
Security Advisory 0175
Summary
A specially crafted packet can cause the premature expiry of multicast forwarding state on affected interfaces, potentially resulting in temporary multicast traffic loss during the affected period.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 13:36 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
1.0.0 , < 4.33.0F
(custom)
Affected: 4.33.0F , ≤ 4.33.8M (custom) Affected: 4.34.0F , ≤ 4.34.7.1M (custom) Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.36.0F , ≤ 4.36.1F (custom) |
Date Public
2026-09-09 00:00
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CVE-2026-73440 (GCVE-0-2026-73440)
Vulnerability from cvelistv5 – Published: 2026-09-16 09:55 – Updated: 2026-09-16 13:40
VLAI
EPSS
VEX
Title
Security Advisory 0178
Summary
On affected platforms running Arista EOS with Simple Network Management Protocol (SNMP) configured, SNMPv3 local or remote user credentials may be exposed as a one-way hashed, localized key value within the device's running and sanitized configurations. An authenticated user who gains access to this sensitive information could leverage it to perform unauthorized read operations on SNMP tables or to send fraudulent trap notifications to the Network Management System (NMS).
This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 13:40 UTC
CWE
- CWE-212 - Improper Removal of Sensitive Information Before Storage or Transfer
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0F , ≤ 4.36.1F
(custom)
Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.34.0F , ≤ 4.34.7.1M (custom) Affected: 4.33.0F , ≤ 4.33.9M (custom) Affected: 1.0.0 , < 4.33.0F (custom) |
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CVE-2026-73469 (GCVE-0-2026-73469)
Vulnerability from cvelistv5 – Published: 2026-09-16 09:55 – Updated: 2026-09-16 13:41
VLAI
EPSS
VEX
Title
Security Advisory 0176
Summary
When specific platforms are using Arista EOS with a loose Unicast Reverse Path Forwarding (uRPF) configuration, certain traffic may not be subjected to the intended verification drop. Consequently, traffic that should be dropped based on these routes could still be processed and forwarded by the device.
This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 13:41 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.35.0F , ≤ 4.35.4M
(custom)
|
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CVE-2026-73453 (GCVE-0-2026-73453)
Vulnerability from cvelistv5 – Published: 2026-09-16 09:46 – Updated: 2026-09-17 03:56
VLAI
EPSS
VEX
Title
Security Advisory 0174
Summary
An unauthenticated P4Runtime (Programming Protocol-Independent Packet Processors Runtime) client can achieve arbitrary code execution under certain conditions on affected platforms running Arista EOS configured with P4Runtime. P4Runtime is disabled by default in Arista EOS. By crafting a malicious packet during the initiation of a P4Runtime session, an attacker can obtain complete administrative control over the compromised switch.
This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 00:00 UTC
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
4.36.0F , ≤ 4.36.1F
(custom)
Affected: 4.35.0F , ≤ 4.35.5M (custom) Affected: 4.34.0F , ≤ 4.34.7M (custom) Affected: 4.33.0F , < 4.34.0F (custom) Affected: 4.32.0F , < 4.33.0F (custom) Affected: 4.31.0F , < 4.32.0F (custom) Affected: 4.30.0F , < 4.31.0F (custom) Affected: 4.29.2F , < 4.30.0F (custom) |
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"value": "\u003cp\u003eTo mitigate this issue, it is recommended to configure the p4-runtime service in mTLS mode (ssl profile with trust certificates). Additionally, enable gNSI Authz to facilitate RPC authorization via the client certificate SPIFFE-ID. Please note that enabling mTLS config will terminate all existing P4 client connections and may cause control plane disruption since packet I/O operations are impacted.\u003c/p\u003e\u003cp\u003eBefore implementing this solution, the following pre-requisites must be met:\u003c/p\u003e\u003col\u003e\u003cli\u003eGenerate SPIFFE-ID client certificate signed by the server trusted CA and use it for establishing P4 client connection to the server.\u003c/li\u003e\u003cli\u003eDefine a json file with SPIFFE-ID based policies for Authz service and install it on the device using gNSI Authz.Rotate() rpc.\u003c/li\u003e\u003c/ol\u003e\u003cpre\u003eswitch\u003eshow running-config section p4-runtime\np4-runtime\n no shutdown\n !\n transport grpc foo\n ssl profile campus\n authentication username priority x509-spiffe\u003c/pre\u003e\u003cpre\u003eswitch\u003eshow running-config section security\nmanagement security\n ssl profile campus\n certificate server.crt key server.key\n trust certificate ca.crt\u003c/pre\u003e\u003cpre\u003eswitch\u003eshow running-config section gnsi\nmanagement api gnsi\n service authz\u003c/pre\u003e"
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"value": "To mitigate this issue, it is recommended to configure the p4-runtime service in mTLS mode (ssl profile with trust certificates). Additionally, enable gNSI Authz to facilitate RPC authorization via the client certificate SPIFFE-ID. Please note that enabling mTLS config will terminate all existing P4 client connections and may cause control plane disruption since packet I/O operations are impacted.\n\nBefore implementing this solution, the following pre-requisites must be met:\n\n1. Generate SPIFFE-ID client certificate signed by the server trusted CA and use it for establishing P4 client connection to the server.\n2. Define a json file with SPIFFE-ID based policies for Authz service and install it on the device using gNSI Authz.Rotate() rpc.\n\n switch\u003eshow running-config section p4-runtime\n p4-runtime\n no shutdown\n !\n transport grpc foo\n ssl profile campus\n authentication username priority x509-spiffe\n\n switch\u003eshow running-config section security\n management security\n ssl profile campus\n certificate server.crt key server.key\n trust certificate ca.crt\n\n switch\u003eshow running-config section gnsi\n management api gnsi\n service authz"
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"cveId": "CVE-2026-73453",
"datePublished": "2026-09-16T09:46:33.548Z",
"dateReserved": "2026-08-12T16:42:47.921Z",
"dateUpdated": "2026-09-17T03:56:37.219Z",
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CVE-2026-73455 (GCVE-0-2026-73455)
Vulnerability from cvelistv5 – Published: 2026-09-16 09:46 – Updated: 2026-09-16 17:56
VLAI
EPSS
VEX
Title
Security Advisory 0173
Summary
On affected platforms running Arista EOS with Open Shortest Path First version 3 (OSPFv3) configured, a specially crafted packet can cause the OSPFv3 agent to restart unexpectedly.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 17:56 UTC
CWE
- CWE-130 - Improper Handling of Length Parameter Inconsistency
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.arista.com/en/support/advisories-noti… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arista Networks | EOS |
Affected:
1.0.0 , < 4.33.0F
(custom)
Affected: 4.33.0F , ≤ 4.33.8M (custom) Affected: 4.34.0F , ≤ 4.34.6M (custom) Affected: 4.35.0F , ≤ 4.35.4M (custom) Affected: 4.36.0F , ≤ 4.36.0.1F (custom) |
Date Public
2026-09-09 00:00
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"value": "\u003cp\u003eThe vulnerability is exploitable when OSPFv3 is configured with at least one active neighbor:\u003c/p\u003e\n\u003cpre\u003e\nswitch\u0026gt;show ospfv3\nRouting Process \u0026quot;ospfv3\u0026quot; with ID 192.0.2.0 and Instance 0 VRF default\nIt has 1 fully adjacent neighbors\n\nswitch\u0026gt;show ospfv3 neighbor\nNeighbor 192.0.3.0 VRF default priority is 1, state is Full\n\u003c/pre\u003e"
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"value": "\u003cp\u003eThe following EOS releases contain the fix:\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003e4.33.9M and later in the 4.33.x train\u003c/li\u003e\n\u003cli\u003e4.34.7M and later in the 4.34.x train\u003c/li\u003e\n\u003cli\u003e4.35.5M and later in the 4.35.x train\u003c/li\u003e\n\u003cli\u003e4.36.1F and later in the 4.36.x train\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003eA hotfix (version 1.0) is available for 4.36.0.1F, 4.35.4M, 4.34.6M, and 4.33.8M.\u003c/p\u003e"
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"value": "\u003cp\u003eConfigure OSPFv3 IPsec encryption to authenticate/encrypt OSPFv3 packets.\u003c/p\u003e\n\u003cp\u003ePer-interface encryption:\u003c/p\u003e\n\u003cpre\u003e\nswitch(config)# interface \u0026lt;interface-name\u0026gt;\nswitch(config-if)# ospfv3 encryption ipsec spi \u0026lt;spi-value\u0026gt; esp aes-256-cbc sha1 passphrase \u0026lt;shared-passphrase\u0026gt;\n\u003c/pre\u003e\n\u003cp\u003ePer-area encryption:\u003c/p\u003e\n\u003cpre\u003e\nswitch(config)# router ospfv3\nswitch(config-router-ospfv3)# address-family ipv4\nswitch(config-router-ospfv3-af)# area \u0026lt;area-id\u0026gt; encryption ipsec spi \u0026lt;spi-value\u0026gt; esp aes-256-cbc sha1 passphrase \u0026lt;shared-passphrase\u0026gt;\n\u003c/pre\u003e"
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