Denial of Service Vulnerability in FreeRDP by FreeRDP Project
CVE-2026-121393

7.1HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
3 November 2026

What is CVE-2026-121393?

FreeRDP versions prior to 3.32.2 are vulnerable to a denial of service attack that can be exploited by malicious RDP servers. An attacker can send specially crafted RemoteFX region rectangles to terminate client processes utilizing verbose WinPR assertions. This is achieved by manipulating a rectangle's coordinates and dimensions, which triggers a critical assertion failure in the message processing function, ultimately leading to the client crashing.

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:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

opensec-intelligence
Kushalkhemka
mayank-jangid-moon
.