Common Weakness Enumeration
CWE-617
Weakness AllowedReachable Assertion
Abstraction: Base · Status: Draft
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
Mapping guidance
This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.
Modes of introduction
Implementation
Detection methods
Automated Static Analysis
Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)
Effectiveness: High
Content history
Submission: CWE Content Team
· MITRE
· 2007-05-07
· CWE Draft 6
Modification: Sean Eidemiller
· Cigital
· 2008-07-01
· CWE 1.0
added/updated demonstrative examples
Modification: Eric Dalci
· Cigital
· 2008-07-01
· CWE 1.0
updated Potential_Mitigations, Time_of_Introduction
Modification: CWE Content Team
· MITRE
· 2008-09-08
· CWE 1.0
updated Description, Relationships, Observed_Example, Other_Notes, Weakness_Ordinalities
Modification: CWE Content Team
· MITRE
· 2011-06-01
· CWE 1.13
updated Common_Consequences
Modification: CWE Content Team
· MITRE
· 2012-05-11
· CWE 2.2
updated Common_Consequences, Observed_Examples, Relationships, Taxonomy_Mappings
Modification: CWE Content Team
· MITRE
· 2012-10-30
· CWE 2.3
updated Potential_Mitigations
Modification: CWE Content Team
· MITRE
· 2014-06-23
· CWE 2.7
updated Common_Consequences, Description, Other_Notes
Modification: CWE Content Team
· MITRE
· 2014-07-30
· CWE 2.8
updated Relationships, Taxonomy_Mappings
Modification: CWE Content Team
· MITRE
· 2017-01-19
· CWE 2.10
updated Relationships
Modification: CWE Content Team
· MITRE
· 2017-11-08
· CWE 3.0
updated Relationships
Modification: CWE Content Team
· MITRE
· 2019-01-03
· CWE 3.2
updated Relationships, Taxonomy_Mappings
Modification: CWE Content Team
· MITRE
· 2019-06-20
· CWE 3.3
updated Relationships, Type
Modification: CWE Content Team
· MITRE
· 2019-09-19
· CWE 3.4
updated Alternate_Terms
Modification: CWE Content Team
· MITRE
· 2023-04-27
· CWE 4.11
updated Detection_Factors, Relationships
Modification: CWE Content Team
· MITRE
· 2023-06-29
· CWE 4.12
updated Mapping_Notes
Modification: CWE Content Team
· MITRE
· 2023-10-26
· CWE 4.13
updated Demonstrative_Examples
Modification: CWE Content Team
· MITRE
· 2024-02-29
· CWE 4.14
updated Observed_Examples
Modification: CWE Content Team
· MITRE
· 2025-12-11
· CWE 4.19
updated Applicable_Platforms, Observed_Examples, Relationships
Modification: CWE Content Team
· MITRE
· 2026-10-28
· CWE 5.0
updated Applicable_Platforms, Common_Consequences, Description, Observed_Examples, Potential_Mitigations, References, Relationships, Taxonomy_Mappings
1302 vulnerabilities reference this CWE, most recent first.
CVE-2026-124465 (GCVE-0-2026-124465)
Vulnerability from cvelistv5 – Published: 2026-11-08 13:52 – Updated: 2026-11-08 13:52
VLAI
EPSS
VEX
Title
Trendyol kafka-konsumer 2.3.3 before 2.6.18 Denial of Service via Batch Consumer Panic
Summary
Trendyol kafka-konsumer from 2.3.3 before 2.6.18 contains a denial of service vulnerability in batch_consumer.go that panics when a single record exceeds MessageGroupByteSizeLimit. Attackers able to produce to the consumed topic can publish one oversized record that terminates the consumer before offset commit, causing a persistent crash loop.
Severity
CWE
- CWE-617 - Reachable Assertion
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/Trendyol/kafka-konsumer/securi… | vendor-advisory |
| https://github.com/Trendyol/kafka-konsumer/commit… | patch |
| https://github.com/Trendyol/kafka-konsumer/releas… | release-notes |
| https://github.com/Trendyol/kafka-konsumer/blob/v… | technical-description |
| https://www.vulncheck.com/advisories/trendyol-kaf… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Trendyol | kafka-konsumer |
Affected:
2.3.3 , < 2.6.18
(semver)
Unaffected: 2.6.18 (semver) |
Date Public
2026-10-21 00:00
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CVE-2026-123557 (GCVE-0-2026-123557)
Vulnerability from cvelistv5 – Published: 2026-11-08 01:37 – Updated: 2026-11-08 01:37
VLAI
EPSS
VEX
Title
Zebra zebrad before 7.0.0 Reachable Assertion DoS via Peer Disconnection
Summary
ZcashFoundation Zebra zebrad before 7.0.0 contains a reachable assertion race condition that allows unauthenticated remote peers to abort the node by triggering disconnection during a blocked outbound send. Malicious peers can return empty FindBlocks or FindHeaders replies and stop reading their socket, dropping an unresolved MustUseClientResponseSender and terminating syncing nodes.
Severity
CWE
- CWE-617 - Reachable Assertion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/ZcashFoundation/zebra/security… | vendor-advisory |
| https://www.vulncheck.com/advisories/zebra-zebrad… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ZcashFoundation | zebra |
Affected:
0 , < 7.0.0
(semver)
Unaffected: 7.0.0 (semver) cpe:2.3:a:zfnd:zebra:*:*:*:*:*:*:*:* |
Date Public
2026-10-22 00:00
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CVE-2026-121960 (GCVE-0-2026-121960)
Vulnerability from cvelistv5 – Published: 2026-11-04 15:33 – Updated: 2026-11-04 18:27
VLAI
EPSS
VEX
Title
FreeRDP before 3.32.2 Unauthenticated Denial of Service via CredSSP TSRequest
Summary
FreeRDP before 3.32.2 contains a denial of service vulnerability in the NLA-enabled shadow server when a CredSSP TSRequest omits negoTokens. Unauthenticated attackers can send a crafted seven-byte TSRequest containing only the version field to trigger a fatal WINPR_ASSERT and abort the server process.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 18:26 UTC
CWE
- CWE-617 - Reachable Assertion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/freerdp-befo… | third-party-advisory |
Impacted products
Date Public
2026-10-20 00:00
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CVE-2026-121951 (GCVE-0-2026-121951)
Vulnerability from cvelistv5 – Published: 2026-11-04 15:33 – Updated: 2026-11-04 18:40
VLAI
EPSS
VEX
Title
FreeRDP 3.0.0 before 3.32.2 Denial of Service via Slow-Path Input Event
Summary
FreeRDP 3.0.0 before 3.32.2 server-side RDP peer input parsing skips the six-byte body of a slow-path input event with an unknown message type without checking it lies within the packet's declared length, causing a WinPR stream assertion failure. A remote RDP client with an active session can send a truncated unknown input event to abort assertion-enabled server processes, causing denial of service.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 18:39 UTC
CWE
- CWE-617 - Reachable Assertion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/freerdp-3.0.… | third-party-advisory |
Impacted products
Date Public
2026-10-20 00:00
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CVE-2026-121409 (GCVE-0-2026-121409)
Vulnerability from cvelistv5 – Published: 2026-11-03 14:28 – Updated: 2026-11-03 17:13
VLAI
EPSS
VEX
Title
FreeRDP before 3.32.2 Denial of Service via Oversized X.224 Routing Token
Summary
FreeRDP before 3.32.2 contains a denial of service vulnerability that allows malicious servers or unauthenticated peers to abort clients or proxies via oversized X.224 routing tokens. Attackers can send an oversized LoadBalanceInfo in a Server Redirection PDU, or a 240–247 byte token to a FixedTarget freerdp-proxy, triggering a tpdu_write_header assertion that crashes the process.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 17:12 UTC
CWE
- CWE-617 - Reachable Assertion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
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Impacted products
Date Public
2026-10-19 00:00
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CVE-2026-121406 (GCVE-0-2026-121406)
Vulnerability from cvelistv5 – Published: 2026-11-03 14:28 – Updated: 2026-11-07 02:52
VLAI
EPSS
VEX
Title
FreeRDP before 3.32.2 Client Denial of Service via Zero-Output ZGFX Payload
Summary
FreeRDP before 3.32.2 allows a client assertion abort because rdpgfx_on_data_received rejects only negative zgfx_decompress status and passes the resulting null output pointer to Stream_StaticConstInit. A malicious RDP server can send a zero-output ZGFX payload on the RDPGFX channel after session activation to terminate the client.
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-07 02:52 UTC
CWE
- CWE-617 - Reachable Assertion
Assigner
References
2 references
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|---|---|
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Date Public
2026-10-19 00:00
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CVE-2026-121396 (GCVE-0-2026-121396)
Vulnerability from cvelistv5 – Published: 2026-11-03 14:28 – Updated: 2026-11-03 18:31
VLAI
EPSS
VEX
Title
FreeRDP 3.0.0 before 3.32.2 denial of service via RTS padding assertion
Summary
FreeRDP clients from 3.0.0 before 3.32.2 built with verbose WinPR assertions contain a reachable assertion in rts_read_auth_verifier triggered by malformed RTS padding. Attackers controlling an RD Gateway can send a crafted RPC-over-HTTP RTS PDU with inconsistent authentication padding to abort the connecting client process.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 17:52 UTC
CWE
- CWE-617 - Reachable Assertion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/freerdp-3.0.… | third-party-advisory |
Impacted products
Date Public
2026-10-19 00:00
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CVE-2026-121395 (GCVE-0-2026-121395)
Vulnerability from cvelistv5 – Published: 2026-11-03 14:27 – Updated: 2026-11-03 14:27
VLAI
EPSS
VEX
Title
FreeRDP 3.17.0 before 3.32.2 Denial of Service via RemoteFX Decoder
Summary
FreeRDP from 3.17.0 before 3.32.2 contains an assertion failure in the RemoteFX differential decoder when verbose WinPR assertions are enabled. A malicious RDP server can send a crafted RemoteFX tile with adjacent LL3 coefficients summing beyond signed 16-bit range to abort the client process.
Severity
CWE
- CWE-617 - Reachable Assertion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/freerdp-3.17… | third-party-advisory |
Impacted products
Date Public
2026-10-19 00:00
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CVE-2026-121394 (GCVE-0-2026-121394)
Vulnerability from cvelistv5 – Published: 2026-11-03 14:27 – Updated: 2026-11-07 02:49
VLAI
EPSS
VEX
Title
FreeRDP before 3.32.2 Denial of Service via RemoteFX RLGR decoder
Summary
FreeRDP from 3.11.0 before 3.32.2 contains an assertion failure in the RemoteFX RLGR decoder that allows malicious servers to terminate clients. Attackers controlling an RDP server can send a RemoteFX tileset with RLGR code 32767, triggering a signed narrowing assertion in rfx_rlgr_decode and crashing the client.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-07 02:49 UTC
CWE
- CWE-617 - Reachable Assertion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
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Impacted products
Date Public
2026-10-19 00:00
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CVE-2026-121393 (GCVE-0-2026-121393)
Vulnerability from cvelistv5 – Published: 2026-11-03 14:27 – Updated: 2026-11-03 16:02
VLAI
EPSS
VEX
Title
FreeRDP 3.0.0 before 3.32.2 Denial of Service via RemoteFX Region Assertion
Summary
FreeRDP from 3.0.0 before 3.32.2 contains a denial of service vulnerability that allows malicious RDP servers to abort clients built with verbose WinPR assertions by sending crafted RemoteFX region rectangles. Attackers can supply a rectangle with x set to 65535 alongside a SurfaceBits destination left of 1, triggering a 16-bit coordinate assertion in rfx_process_message that terminates the client process.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-03 16:01 UTC
CWE
- CWE-617 - Reachable Assertion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/freerdp-3.0.… | third-party-advisory |
Impacted products
Date Public
2026-10-19 00:00
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Mitigation
Implementation
If the assertion statement is required (e.g., for security or reliability), change the invoking code to avoid the conditions that trigger the assertion.
Mitigation
Implementation
Consider changing the assertion to some other less "fatal" error. This might not be easy to implement, since other code may be needed to handle the error.
Mitigation
Implementation
Make sensitive open/close operations non-reachable from directly user-controlled data (e.g. open/close resources)
Mitigation
Implementation
Strategy: Input Validation
Perform input validation on user data.
No CAPEC attack patterns related to this CWE.