{"id":"CVE-2026-109952","published":"2026-10-13T14:17:33.877","lastModified":"2026-10-16T22:17:20.110","description":"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.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","cwes":["CWE-757"],"vendors":[],"products":[],"references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65","tags":[]},{"url":"https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-security-protocol-downgrade-via-negotiation-response","tags":[]},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65","tags":[]}],"exploitRefs":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65","tags":[]},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65","tags":[]}],"hasPoc":true,"ai":null}