{"id":"CVE-2026-50324","aliases":["EUVD-2026-43887","GHSA-594h-q75v-4prq"],"status":"published","title":"Windows Active Directory Federation Services Denial of Service Vulnerability","description":"Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00855,"percentile":0.58607,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-835"],"published":"2026-07-14T17:06:42Z","modified":"2026-11-01T17:34:16Z","products":[{"vendor":"microsoft","product":"microsoft .net framework 3.5 and 4.7.2"},{"vendor":"microsoft","product":"microsoft .net framework 3.5 and 4.8"},{"vendor":"microsoft","product":"microsoft .net framework 3.5 and 4.8.1"},{"vendor":"microsoft","product":"microsoft .net framework 4.6.2/4.7/4.7.1/4.7.2"},{"vendor":"microsoft","product":"microsoft .net framework 4.8"},{"vendor":"microsoft","product":"microsoft .net framework 4.8.1"},{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_1607"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_server_2012"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50324","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50324"},{"url":"https://github.com/advisories/GHSA-594h-q75v-4prq"}],"sources":{"cve":[{"id":"CVE-2026-50324","title":"Windows Active Directory Federation Services Denial of Service Vulnerability","description":"Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-07-14T17:06:42.48Z","modified":"2026-11-01T17:34:16.547Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-835"],"updated_at":"2026-11-02T14:20:09.098623Z"}],"euvd":[{"id":"EUVD-2026-43887","description":"Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-07-14T17:06:42Z","modified":"2026-11-01T17:34:16Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T16:58:48.316156Z"}],"ghsa":[{"id":"GHSA-594h-q75v-4prq","title":"Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services ...","description":"Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-07-14T18:32:15Z","modified":"2026-07-14T18:32:22Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-835"],"updated_at":"2026-11-02T15:09:29.53235Z"}],"nvd":[{"id":"CVE-2026-50324","description":"Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.","status":"published","published":"2026-07-14T18:17:31.277Z","modified":"2026-07-22T16:17:39.93Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-835"],"updated_at":"2026-11-02T14:12:29.489525Z"}]}}