{"id":"CVE-2026-121406","title":"FreeRDP before 3.32.2 Client Denial of Service via Zero-Output ZGFX Payload","summary":"FreeRDP before 3.32.2 allows a client assertion abort because rdpgfx_on_data_received rejects only negative zgfx_decompress status and passes the resulting null output pointer to Stream_StaticConstInit. A malicious RDP server can send a …","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-617"],"vendor":"FreeRDP","product":"FreeRDP","affected":["FreeRDP < 3.32.2"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-07T02:52:17.471246Z"},"exploitAvailable":true,"published":"2026-11-03","updated":"2026-11-07","sourceUpdated":"2026-11-07T02:52:48.281Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121406","references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-2c9x-4gr7-hrwx","label":"GitHub Security Advisory (GHSA-2c9x-4gr7-hrwx)"},{"url":"https://www.vulncheck.com/advisories/freerdp-before-3.32.2-client-denial-of-service-via-zero-output-zgfx-payload","label":"VulnCheck Advisory: FreeRDP before 3.32.2 Client Denial of Service via Zero-Output ZGFX Payload"}],"tags":["cve.org","exploit-available"],"epss":0.00234,"epssPercentile":0.14421,"ingestedAt":"2026-11-05T19:30:42.963Z","slug":"CVE-2026-121406","body":"## Overview\n\nFreeRDP before 3.32.2 allows a client assertion abort because rdpgfx_on_data_received rejects only negative zgfx_decompress status and passes the resulting null output pointer to Stream_StaticConstInit. A malicious RDP server can send a zero-output ZGFX payload on the RDPGFX channel after session activation to terminate the client.\n\n## Affected\n\n- `FreeRDP < 3.32.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":36,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":235730,"id":"CVE-2026-121406","ts":1794020953423,"field":"exploit_available","old":"false","new":"true"}]}