{"id":"CVE-2026-121638","aliases":["EUVD-2026-116931","GHSA-97r6-h6fj-p27h"],"status":"published","title":"WatchGuard AuthPoint Gateway Improper Certificate Validation Allows Man-in-the-Middle Attacks","description":"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":{"version":"4.0","score":9.1,"vector":"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","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00292,"percentile":0.22046,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2026-11-04T14:44:14Z","modified":"2026-11-04T15:32:40Z","products":[{"vendor":"watchguard","product":"authpoint authentication gateway"}],"references":[{"url":"https://psirt.watchguard.com/CVE-2026-121638","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121638"},{"url":"https://github.com/advisories/GHSA-97r6-h6fj-p27h"}],"sources":{"cve":[{"id":"CVE-2026-121638","title":"WatchGuard AuthPoint Gateway Improper Certificate Validation Allows Man-in-the-Middle Attacks","description":"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.","status":"published","published":"2026-11-04T14:44:14.541Z","modified":"2026-11-04T18:20:22.305Z","cvss":[{"version":"4.0","score":9.1,"vector":"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","level":"critical","assessor":"cna"}],"cwes":["CWE-295"],"updated_at":"2026-11-04T19:37:11.952963Z"}],"euvd":[{"id":"EUVD-2026-116931","description":"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.","status":"published","published":"2026-11-04T14:44:14Z","modified":"2026-11-04T18:20:22Z","cvss":[{"version":"4.0","score":9.1,"vector":"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","level":"critical"}],"updated_at":"2026-11-04T19:12:51.694741Z"}],"ghsa":[{"id":"GHSA-97r6-h6fj-p27h","title":"An Improper Certificate Validation vulnerability in WatchGuard AuthPoint Gateway allows an...","description":"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.","status":"published","published":"2026-11-04T15:32:31Z","modified":"2026-11-04T15:32:40Z","cvss":[{"version":"4.0","score":9.1,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"}],"cwes":["CWE-295"],"updated_at":"2026-11-04T15:52:09.418756Z"}],"nvd":[{"id":"CVE-2026-121638","description":"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.","status":"published","published":"2026-11-04T15:17:42.437Z","modified":"2026-11-06T21:15:29.947Z","cvss":[{"version":"4.0","score":9.1,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"}],"cwes":["CWE-295"],"updated_at":"2026-11-07T00:02:36.119898Z"}]}}