Denial of Service Vulnerability in FreeRDP 3.x from FreeRDP
CVE-2026-121951

8.7HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
4 November 2026

What is CVE-2026-121951?

The vulnerability in FreeRDP prior to version 3.32.2 allows a remote RDP client to exploit a flaw in server-side input parsing. By skipping the validation of a six-byte body in slow-path input events, an attacker can send a truncated input event, triggering an assertion failure in WinPR streams. This disruption can lead to denial of service for the affected server, resulting in interrupted service and potential downtime.

Affected Version(s)

FreeRDP 3.0.0 < 3.32.2

FreeRDP 3.32.2

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/freerdp-3.0.0-before...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kushalkhemka
mayank-jangid-moon
opensec-intelligence
.