CVE-2026-121960

FreeRDP before 3.32.2 contains a denial of service vulnerability in the NLA-enabled shadow server when a CredSSP TSRequest omits negoTokens. Unauthenticated attackers can send a crafted seven-byte TSRequest containing only the version field to trigger a fatal WINPR_ASSERT and abort the server process.

• CWE-617

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3pg4-5r42-wxvjExploit, Mitigation, Vendor Advisory
• https://www.vulncheck.com/advisories/freerdp-before-3.32.2-unauthenticated-denial-of-service-via-credssp-tsrequestThird Party Advisory
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3pg4-5r42-wxvjExploit, Mitigation, Vendor Advisory

Published

Nov 4, 2026

Last Modified

Nov 5, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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