Denial of Service in FreeRDP by Malicious RemoteFX Tileset
CVE-2026-121394

7.1HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
3 November 2026

What is CVE-2026-121394?

The RemoteFX RLGR decoder in FreeRDP versions prior to 3.32.2 is affected by an assertion failure due to a malformed RemoteFX tileset with RLGR code 32767. Attackers exploiting this vulnerability can terminate clients by sending specially crafted data from a malicious RDP server, causing the client to crash.

Affected Version(s)

FreeRDP 3.11.0 < 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:
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
.