{"id":"CVE-2026-83645","title":"Allocation of resources without limits or throttling in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.","summary":"Allocation of resources without limits or throttling in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T21:18:30.667","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-83645","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83645","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-13T19:43:29.074Z","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_2012 >= 6.2.9200.0 < 6.2.9200.26434","windows_server_2012_server_core_installation >= 6.2.9200.0 < 6.2.9200.26434","windows_server_2012_r2 >= 6.3.9600.0 < 6.3.9600.23470","windows_server_2012_r2_server_core_installation >= 6.3.9600.0 < 6.3.9600.23470","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"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-13T20:38:23.421655Z"},"epss":0.01249,"epssPercentile":0.69211,"slug":"CVE-2026-83645","body":"## Overview\n\nAllocation of resources without limits or throttling in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service 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":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}