{"id":"CVE-2026-83511","title":"Weak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.","summary":"Weak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-1390"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T23:18:11.050","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-83511","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83511","label":"secure@microsoft.com"}],"tags":["nvd"],"ingestedAt":"2026-10-13T19:43:29.061Z","slug":"CVE-2026-83511","body":"## Overview\n\nWeak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}