Vulnerability in Freerdp
CVE-2026-121393
FreeRDP from 3.0.0 before 3.32.2 contains a denial of service vulnerability that allows malicious RDP servers to abort clients built with verbose WinPR assertions by sending crafted RemoteFX region rectangles. Attackers can supply a rectangle with x set to 65535 alongside a SurfaceBits destination left of 1, triggering a 16-bit coordinate assertion in rfx_process_message that terminates the client process.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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-7qw2-8h66-pvpw (vendor-advisory, 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-2026-121393?
- CVE-2026-121393 is a medium-severity vulnerability in Freerdp, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-11-03.
- How severe is CVE-2026-121393?
- Medium severity. CVSS v3 base score is 6.5 out of 10.