{"id":"CVE-2026-83646","title":"Url redirection to untrusted site ('open redirect') in Active Directory Federation Services (AD FS) allows an authorized attacker to perform spoofing over a network.","summary":"Url redirection to untrusted site ('open redirect') in Active Directory Federation Services (AD FS) allows an authorized attacker to perform spoofing over a network.","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-601"],"vendor":"Microsoft","product":"Windows 10 Version 1607","affected":["windows_10_version_1607 >= 10.0.14393.0 < 10.0.14393.9612","windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.9376","windows_server_2016 >= 10.0.14393.0 < 10.0.14393.9612","windows_server_2016_server_core_installation >= 10.0.14393.0 < 10.0.14393.9612","windows_server_2019 >= 10.0.17763.0 < 10.0.17763.9376","windows_server_2019_server_core_installation >= 10.0.17763.0 < 10.0.17763.9376","windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5761","windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33650","windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33650"],"published":"2026-10-13","updated":"2026-10-16","sourceUpdated":"2026-10-16T16:21:12.173","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-83646","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83646","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"epss":0.00417,"epssPercentile":0.35811,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-16T00:58:59.253735Z"},"ingestedAt":"2026-10-13T19:43:29.074Z","slug":"CVE-2026-83646","body":"## Overview\n\nUrl redirection to untrusted site ('open redirect') in Active Directory Federation Services (AD FS) allows an authorized 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":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}