CVE-2026-121951

HighCVSS 7.5/10Last modified Nov 5, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-617

Affected software

Vendor	Product	Versions
FreeRDP	FreeRDP	>= 3.0.0, < 3.32.2

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4qq4-qwxq-49m8Exploit, Mitigation, Vendor Advisory
https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.2-denial-of-service-via-slow-path-input-eventThird Party Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4qq4-qwxq-49m8Exploit, Mitigation, Vendor Advisory

Timeline

Published: Nov 4, 2026
Last modified: Nov 5, 2026
NVD status: Analyzed

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