{"id":"CVE-2026-121392","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-121392","summary":"FreeRDP before 3.32.2 contains an improper certificate validation vulnerability in tls_verify_certificate() that accepts Common Name fallback despite non-matching SAN entries and matches…","details":"FreeRDP before 3.32.2 contains an improper certificate validation vulnerability in tls_verify_certificate() that accepts Common Name fallback despite non-matching SAN entries and matches IP literals against DNS strings. Man-in-the-middle attackers holding a certificate from a client-trusted CA can bypass server identity checks to intercept RDP sessions, including keystrokes, clipboard, and screen content.","published":"2026-11-03T15:17:26.710","modified":"2026-11-03T15:17:26.860","cvss":{"score":7.4,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-jq25-3374-4262"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/freerdp-before-3.32.2-certificate-identity-validation-bypass-via-tls-verify-certificate"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-11-03T15:17:26.860"}}