CVE-2026-121401

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.

• CWE-476

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8rjm-m7xg-mg6mVendor Advisory
• https://www.vulncheck.com/advisories/freerdp-before-3.32.2-denial-of-service-via-rd-gateway-extended-auth-packetThird Party Advisory
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8rjm-m7xg-mg6mVendor Advisory

Published

Nov 3, 2026

Last Modified

Nov 3, 2026

Status

Modified

• 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.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

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