Vulnerability in Freerdp
CVE-2026-121951
FreeRDP 3.0.0 before 3.32.2 server-side RDP peer input parsing skips the six-byte body of a slow-path input event with an unknown message type without checking it lies within the packet's declared length, causing a WinPR stream assertion failure. A remote RDP client with an active session can send a truncated unknown input event to abort assertion-enabled server processes, causing denial of service.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
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-4qq4-qwxq-49m8 (Exploit, vendor-advisory, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.2-denial-of-service-via-… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-121951?
- CVE-2026-121951 is a high-severity vulnerability in Freerdp, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2026-11-04.
- How severe is CVE-2026-121951?
- High severity. CVSS v3 base score is 7.5 out of 10.