Denial of Service Vulnerability in FreeRDP Software by FreeRDP
CVE-2026-121406

5.3MEDIUM

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
3 November 2026

What is CVE-2026-121406?

FreeRDP versions prior to 3.32.2 are vulnerable to a denial of service attack due to improper handling of ZGFX decompression. By sending a zero-output ZGFX payload over the RDPGFX channel after session activation, a malicious RDP server can exploit this flaw to cause the client application to terminate unexpectedly. This vulnerability highlights the importance of regular software updates and vigilance against potential attack vectors.

Affected Version(s)

FreeRDP 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-before-3.32....
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kushalkhemka
mayank-jangid-moon
opensec-intelligence
.