{"id":"CVE-2026-121637","title":"WatchGuard AuthPoint Gateway Improper HMAC Validation in LDAP Authentication Callback Allows Forged Authentication Results","summary":"An improper integrity validation vulnerability in WatchGuard AuthPoint Gateway's LDAP authentication callback allows a network attacker who has obtained a valid header signature to forge the authentication result and transaction identifi…","severity":"high","cvss":8.9,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N","cvssSource":"cna","cwe":["CWE-345"],"vendor":"WatchGuard","product":"AuthPoint Authentication Gateway","affected":["authpoint_authentication_gateway >= 1.0 < 7.6.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-04T16:38:03.602877Z"},"published":"2026-11-04","updated":"2026-11-04","sourceUpdated":"2026-11-04T18:20:22.014Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121637","references":[{"url":"https://psirt.watchguard.com/CVE-2026-121637"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T21:36:00.483Z","slug":"CVE-2026-121637","body":"## Overview\n\nAn improper integrity validation vulnerability in WatchGuard AuthPoint Gateway's LDAP authentication callback allows a network attacker who has obtained a valid header signature to forge the authentication result and transaction identifier in the request body, resulting in unauthorized session outcomes.\n\n## Affected\n\n- `authpoint_authentication_gateway >= 1.0 < 7.6.0`\n\n## Remediation\n\nAuthPoint Authentication Gateway 7.6.0","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":49,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}