Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck

CVE-2026-121393FreeRDP 3.0.0 before 3.32.2 Denial of Service via RemoteFX Region Assertion

Medium 6.5

In plain English

A medium-severity security flaw in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 70.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

FreeRDP from 3.0.0 before 3.32.2 contains a denial of service vulnerability that allows malicious RDP servers to abort clients built with verbose WinPR assertions by sending crafted RemoteFX region rectangles. Attackers can supply a rectangle with x set to 65535 alongside a SurfaceBits destination left of 1, triggering a 16-bit coordinate assertion in rfx_process_message that terminates the client process.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-121393
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-121393
Debian:14	freerdp3	3.32.2+dfsg-1	DEBIAN-CVE-2026-121393
Ubuntu:22.04:LTS	freerdp2	no fix listed	UBUNTU-CVE-2026-121393
Ubuntu:24.04:LTS	freerdp3	no fix listed	UBUNTU-CVE-2026-121393
Ubuntu:26.04:LTS	freerdp3	no fix listed	UBUNTU-CVE-2026-121393
Ubuntu:26.10	freerdp3	no fix listed	UBUNTU-CVE-2026-121393

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	3.0.0 – before 3.32.2

Weakness: CWE-617 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-7qw2-8h66-pvpw) vendor-advisory
VulnCheck Advisory: FreeRDP 3.0.0 before 3.32.2 Denial of Service via RemoteFX Region Assertion third-party-advisory