{"id":"CVE-2026-91959","title":"FreeRDP before 3.31.0 contains a buffer over-read vulnerability in the rts_read_result function within the RPC gateway transport parser","summary":"FreeRDP before 3.31.0 contains a buffer over-read vulnerability in the rts_read_result function within the RPC gateway transport parser. Attackers can send a malicious BIND_ACK PDU with a truncated result entry to trigger an out-of-bound…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-125"],"vendor":"FreeRDP","product":"FreeRDP","affected":["FreeRDP < 3.31.0"],"published":"2026-09-15","updated":"2026-09-20","sourceUpdated":"2026-09-20T01:16:34.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91959","references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-pj8w-fh79-f438","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/freerdp-before-3.31.0-buffer-over-read-via-rts-gateway","label":"disclosure@vulncheck.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91959.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-91959"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533951"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-91959"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91959"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-20T00:29:03.414714Z"},"epss":0.00346,"epssPercentile":0.2823,"ingestedAt":"2026-09-15T15:39:12.917Z","slug":"CVE-2026-91959","body":"## Overview\n\nFreeRDP before 3.31.0 contains a buffer over-read vulnerability in the rts_read_result function within the RPC gateway transport parser. Attackers can send a malicious BIND_ACK PDU with a truncated result entry to trigger an out-of-bounds read causing process abort.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91959.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":207843,"id":"CVE-2026-91959","ts":1789866747369,"field":"exploit_available","old":"false","new":"true"}]}