{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-121638","assignerOrgId":"5d1c2695-1a31-4499-88ae-e847036fd7e3","state":"PUBLISHED","assignerShortName":"WatchGuard","dateReserved":"2026-11-03T17:27:06.115Z","datePublished":"2026-11-04T14:44:14.541Z","dateUpdated":"2026-11-04T18:20:22.305Z"},"containers":{"cna":{"providerMetadata":{"orgId":"5d1c2695-1a31-4499-88ae-e847036fd7e3","shortName":"WatchGuard","dateUpdated":"2026-11-04T14:44:14.541Z"},"title":"WatchGuard AuthPoint Gateway Improper Certificate Validation Allows Man-in-the-Middle Attacks","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"WatchGuard","product":"AuthPoint Authentication Gateway","versions":[{"status":"affected","version":"1.0","versionType":"semver","lessThan":"7.6.0"}],"defaultStatus":"unaffected"}],"references":[{"url":"https://psirt.watchguard.com/CVE-2026-121638","tags":["vendor-advisory"]}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:watchguard:authpoint_authentication_gateway:*:*:*:*:*:*:*:*","versionStartIncluding":"1.0","versionEndExcluding":"7.6.0"}]}]}],"metrics":[{"cvssV4_0":{"version":"4.0","vectorString":"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","baseScore":9.1,"baseSeverity":"CRITICAL"}}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-295","type":"CWE","cweId":"CWE-295"}]}],"credits":[{"lang":"en","value":"WatchGuard AI Security Research","type":"finder"}],"configurations":[{"lang":"en","value":"This vulnerability affects AuthPoint Gateway deployments configured with a RADIUS, LDAP or ADFS resource.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>This vulnerability affects AuthPoint Gateway deployments configured with a RADIUS, LDAP or ADFS resource.</p>"}]}],"solutions":[{"lang":"en","value":"AuthPoint Authentication Gateway 7.6.0","supportingMedia":[{"type":"text/html","base64":false,"value":"AuthPoint Authentication Gateway 7.6.0"}]}],"exploits":[{"lang":"en","value":"WatchGuard is not aware of any exploitation of this vulnerability in the wild.","supportingMedia":[{"type":"text/html","base64":false,"value":"WatchGuard is not aware of any exploitation of this vulnerability in the wild."}]}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-121638","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-11-04T16:38:45.464042Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-04T18:20:22.305Z"}}]}}