Vulnerability in Freerdp
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_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.
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65 (vendor-advisory)
- www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-security-protocol-down… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109952?
- CVE-2026-109952 is a medium-severity vulnerability in Freerdp, classified under CWE-757. CVSS score: 5.3/10. Published 2026-10-13.
- How severe is CVE-2026-109952?
- Medium severity. CVSS v3 base score is 5.3 out of 10.