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 | CPE status | |
|---|---|---|---|---|
| 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) |
guessed |
Date Public
2026-09-09 18:55
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"value": "\u003cp\u003eIn order to be vulnerable to CVE-2026-73457, gNPSI must be configured with trace facility EosRpcAuth enabled explicitly:\u003c/p\u003e\u003cpre\u003eswitch\u0026gt; show trace Gnpsi | grep Auth\nEosRpcAuth enabled 0123456789.\u003c/pre\u003e\u003cp\u003eSystems remain unaffected if gNPSI is not enabled (default configuration):\u003c/p\u003e\u003cpre\u003eswitch\u0026gt; show management api gnpsi\nEnabled: no transports enabled\u003c/pre\u003e"
}
],
"value": "In order to be vulnerable to CVE-2026-73457, gNPSI must be configured with trace facility EosRpcAuth enabled explicitly:\n\n\n\nswitch\u003e show trace Gnpsi | grep Auth\nEosRpcAuth enabled 0123456789.\n\n\n\nSystems remain unaffected if gNPSI is not enabled (default configuration):\n\n\n\nswitch\u003e show management api gnpsi\nEnabled: no transports enabled"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered internally by Arista."
}
],
"datePublic": "2026-09-09T18:55:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eUnder 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.\u003c/p\u003e"
}
],
"value": "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."
}
],
"impacts": [
{
"capecId": "CAPEC-118",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-118 Information Disclosure"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-532",
"description": "CWE-532 Insertion of Sensitive Information into Log File",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-16T18:57:50.711Z",
"orgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
"shortName": "Arista"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://www.arista.com/en/support/advisories-notices/security-advisory/24714-security-advisory-0158"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eThe recommended resolution is to upgrade to a remediated software version at your earliest convenience. CVE-2026-73457 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"
}
],
"value": "The recommended resolution is to upgrade to a remediated software version at your earliest convenience. CVE-2026-73457 has been fixed in the following releases:\n\n * 4.36.2F and later releases in the 4.36.x train\n * 4.35.6M and later releases in the 4.35.x train\n * 4.34.8M and later releases in the 4.34.x train"
}
],
"source": {
"advisory": "158",
"defect": [
"1824885"
],
"discovery": "INTERNAL"
},
"title": "Under certain circumstances, the gNPSI client credentials might be logged in clear text, in local or remote accounting logs to authenticated users.",
"workarounds": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"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"
}
],
"value": "To secure the agent against\u00a0 CVE-2026-73457, the service must be configured to use mutual TLS and only x509-spiffe authentication must be enabled.\n\n\n\nmanagement security\n\u00a0\u00a0\u00a0ssl profile P1\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0certificate server.crt key server.key\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0trust certificate ca_client.crt\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0chain certificate ca_signing.crt\n!\nmanagement api gnpsi\n\u00a0\u00a0\u00a0transport grpc t2\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ssl profile P1\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0port 7001\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0authentication username priority x509-spiffe\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0no disabled\n\n\n\u00a0\n\n\n\nLogs are disabled by default, including the affected facility EosRpcAuth.To mitigate CVE-2026-73457, ensure the facility EosRpcAuth status is set to disabled. The command below can be used to restore all Gnpsi agent tracing to its default setting.\n\n\n\nswitch(config)# no trace Gnpsi setting\n\n\n\u00a0\n\n\n\nShould 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.\n\n\n\nUse the following commands to clean up Gnpsi log files:\n\n\n\nswitch(config)# bash sudo truncate -s 0 /var/log/agents/Gnpsi*\n\n\n\u00a0\n\n\n\nThen use the following commands to clean up previously rotated old log files:\n\n\n\nswitch(config)# bash sudo find /var/log/agents -name \u0027Gnpsi*.gz\u0027 -type f -delete"
}
],
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
"assignerShortName": "Arista",
"cveId": "CVE-2026-73457",
"datePublished": "2026-09-16T18:57:50.711Z",
"dateReserved": "2026-08-12T16:45:03.510Z",
"dateUpdated": "2026-09-16T18:57:50.711Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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