Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck

CVE-2026-121390FreeRDP before 3.32.2 Null Pointer Crash via ARM Gateway Response

Medium 4.3

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 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.2%top 95.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

FreeRDP 3.0.0 before 3.32.2 built with WITH_AAD=ON contains a reachable assertion because its ARM gateway response parser accepts a missing or non-string redirectedServerCert field and passes a null buffer to the certificate parser. A malicious or malformed user-selected gateway can return such a response to abort the client process.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-121390
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-121390
Debian:14	freerdp3	3.32.2+dfsg-1	DEBIAN-CVE-2026-121390
Ubuntu:22.04:LTS	freerdp2	no fix listed	UBUNTU-CVE-2026-121390
Ubuntu:24.04:LTS	freerdp3	no fix listed	UBUNTU-CVE-2026-121390
Ubuntu:26.04:LTS	freerdp3	no fix listed	UBUNTU-CVE-2026-121390
Ubuntu:26.10	freerdp3	no fix listed	UBUNTU-CVE-2026-121390

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:L

References

GitHub Security Advisory (GHSA-hqf8-95c7-6r92) vendor-advisory
VulnCheck Advisory: FreeRDP before 3.32.2 Null Pointer Crash via ARM Gateway Response third-party-advisory