{"id":"CVE-2026-121638","title":"WatchGuard AuthPoint Gateway Improper Certificate Validation Allows Man-in-the-Middle Attacks","summary":"An Improper Certificate Validation vulnerability in WatchGuard AuthPoint Gateway allows an attacker with an on-path network position to intercept and modify communications between the AuthPoint Gateway and local authentication providers.","severity":"critical","cvss":9.1,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-295"],"vendor":"WatchGuard","product":"AuthPoint Authentication Gateway","affected":["authpoint_authentication_gateway >= 1.0 < 7.6.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-11-04T16:38:45.464042Z"},"published":"2026-11-04","updated":"2026-11-04","sourceUpdated":"2026-11-04T18:20:22.305Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121638","references":[{"url":"https://psirt.watchguard.com/CVE-2026-121638"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T21:36:00.485Z","slug":"CVE-2026-121638","body":"## Overview\n\nAn Improper Certificate Validation vulnerability in WatchGuard AuthPoint Gateway allows an attacker with an on-path network position to intercept and modify communications between the AuthPoint Gateway and local authentication providers.\n\n## Affected\n\n- `authpoint_authentication_gateway >= 1.0 < 7.6.0`\n\n## Remediation\n\nAuthPoint Authentication Gateway 7.6.0","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}