MEDIUM 6.0 NVD
CVE-2026-109952
The FreeRDP client 3.0.0 before 3.32.0 does not check a server-selected PROTOCOL_RDSTLS or PROTOCOL_HYBRID_EX against its enabled protocol set in nego_process_n
The FreeRDP client 3.0.0 before 3.32.0 does not check a server-selected PROTOCOL_RDSTLS or PROTOCOL_HYBRID_EX against its enabled protocol set in nego_process_negotiation_response(), allowing a security protocol downgrade. A malicious server or man-in-the-middle can select RDSTLS to override /sec:nla pinning, complete authentication with an all-zero cookie, and receive the user's cleartext password in the Client Info PDU.
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65
- https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-security-protocol-downgra
This medium severity vulnerability with a CVSS score of 6.0 was published on 2026-10-13 via NVD.
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