CVE-2026-121956

HighCVSS 7.5/10Last modified Nov 5, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-415

Affected software

Vendor	Product	Versions
FreeRDP	FreeRDP	< 3.32.2

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-2557-79qc-6gfrExploit, Mitigation, Vendor Advisory
https://www.vulncheck.com/advisories/freerdp-before-3.32.2-double-free-in-winpr-kerberos-retrievesometgtThird Party Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-2557-79qc-6gfrExploit, Mitigation, Vendor Advisory

Timeline

Published: Nov 4, 2026
Last modified: Nov 5, 2026
NVD status: Analyzed

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