Vulnerability · Published Nov 4, 2026 · Assigned by VulnCheck

CVE-2026-121956FreeRDP before 3.32.2 Double Free in WinPR Kerberos retrieveSomeTgt

High 7.5

In plain English

A high-severity double free 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 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 62.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

FreeRDP before 3.32.2 contains a double free in the WinPR Kerberos SSPI retrieveSomeTgt function, which installs the krb5 default realm into a target principal that has an empty realm without taking ownership of it. Unauthenticated remote clients can send a crafted NLA/CredSSP u2u TGT request whose server-name component contains '@' to corrupt the heap and crash the server process.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-121956
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-121956
Debian:14	freerdp3	3.32.2+dfsg-1	DEBIAN-CVE-2026-121956

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	0 – before 3.32.2

Weakness: CWE-415 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-2557-79qc-6gfr) vendor-advisory
VulnCheck Advisory: FreeRDP before 3.32.2 Double Free in WinPR Kerberos retrieveSomeTgt third-party-advisory