{"id":"CVE-2026-83926","title":"Improper certificate validation in Windows Hello allows an authorized attacker to bypass a security feature locally.","summary":"Improper certificate validation in Windows Hello allows an authorized attacker to bypass a security feature locally.","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-295"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T23:18:39.417","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-83926","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83926","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-13T19:43:29.143Z","vendor":"Microsoft","product":"Windows 10 Version 1809","affected":["windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.9376","windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7807","windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19044.7807","windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7652","windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7652","windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9711","windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9711","windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.3231","windows_11_version_26h2 >= 10.0.26300.0 < 10.0.26300.9711","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":"no","technicalImpact":"partial","timestamp":"2026-10-13T22:17:12.271030Z"},"epss":0.00389,"epssPercentile":0.32806,"slug":"CVE-2026-83926","body":"## Overview\n\nImproper certificate validation in Windows Hello allows an authorized attacker to bypass a security feature locally.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}