{"id":"CVE-2026-109253","title":"FreeRDP from 3.9.0 before 3.32.0 contains an out-of-bounds read vulnerability in the RDPEAR NDR scalar readers, which check value length before consuming alignment padding","summary":"FreeRDP from 3.9.0 before 3.32.0 contains an out-of-bounds read vulnerability in the RDPEAR NDR scalar readers, which check value length before consuming alignment padding. Malicious or compromised RDP servers can send crafted unaligned …","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-125"],"published":"2026-10-12","updated":"2026-10-13","sourceUpdated":"2026-10-13T20:39:48.767","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109253","references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6rj3-rf6g-3vw5","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/freerdp-3.9.0-before-3.32.0-rdpear-ndr-scalar-out-of-bounds-read","label":"disclosure@vulncheck.com"},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6rj3-rf6g-3vw5","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-109253.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-109253"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2549807"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-109253"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109253"}],"tags":["nvd","csaf","vex","red-hat","cve.org","exploit-available"],"epss":0.00285,"epssPercentile":0.20888,"ingestedAt":"2026-10-12T18:00:08.177Z","vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-13T15:29:28.506184Z"},"slug":"CVE-2026-109253","body":"## Overview\n\nFreeRDP from 3.9.0 before 3.32.0 contains an out-of-bounds read vulnerability in the RDPEAR NDR scalar readers, which check value length before consuming alignment padding. Malicious or compromised RDP servers can send crafted unaligned RDPEAR payloads, such as CreateApReqAuthenticatorReq messages, to clients using Remote Credential Guard, causing over-reads and potentially crashing the client process.\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 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-13 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-109253.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":220943,"id":"CVE-2026-109253","ts":1792026932707,"field":"exploit_available","old":"false","new":"true"}]}