Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck

CVE-2026-121401FreeRDP before 3.32.2 Denial of Service via RD Gateway extended-auth packet

Medium 4.3

In plain English

A medium-severity null pointer dereference in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 75.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

FreeRDP before 3.32.2 contains a denial of service vulnerability where rdg_process_packet dispatches a PKT_TYPE_EXTENDED_AUTH_MSG without verifying negotiated mode or auth context. A malicious or compromised RD Gateway can send the extended-auth packet before tunnel authentication, triggering a null-pointer dereference that crashes the client.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-121401
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-121401
Debian:14	freerdp3	3.32.2+dfsg-1	DEBIAN-CVE-2026-121401
Ubuntu:22.04:LTS	freerdp2	no fix listed	UBUNTU-CVE-2026-121401
Ubuntu:24.04:LTS	freerdp3	no fix listed	UBUNTU-CVE-2026-121401
Ubuntu:26.04:LTS	freerdp3	no fix listed	UBUNTU-CVE-2026-121401
Ubuntu:26.10	freerdp3	no fix listed	UBUNTU-CVE-2026-121401

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	0 – before 3.32.2

Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

References

GitHub Security Advisory (GHSA-8rjm-m7xg-mg6m) vendor-advisory
VulnCheck Advisory: FreeRDP before 3.32.2 Denial of Service via RD Gateway extended-auth packet third-party-advisory