{"id":"CVE-2026-27906","title":"Improper input validation in Windows Hello allows an authorized attacker to bypass a security feature locally.","summary":"Improper input 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-20"],"vendor":"microsoft","product":"windows_10_21h2","affected":["windows_10_21h2 < 10.0.19044.7184","windows_10_22h2 < 10.0.19045.7184","windows_11_23h2 < 10.0.22631.6936","windows_11_24h2 < 10.0.26100.8246","windows_11_25h2 < 10.0.26200.8246","windows_11_26h1 < 10.0.28000.1836"],"patched":["windows_10_21h2 10.0.19044.7184","windows_10_22h2 10.0.19045.7184","windows_11_23h2 10.0.22631.6936","windows_11_24h2 10.0.26100.8246","windows_11_25h2 10.0.26200.8246","windows_11_26h1 10.0.28000.1836"],"published":"2026-04-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T23:17:37.060","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-27906","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27906","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"epss":0.00387,"epssPercentile":0.32631,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-04-14T18:03:47.349252Z"},"ingestedAt":"2026-09-25T18:14:20.456Z","slug":"CVE-2026-27906","body":"## Overview\n\nImproper input validation in Windows Hello allows an authorized attacker to bypass a security feature locally.\n\n## Affected\n\n- `windows_10_21h2 < 10.0.19044.7184`\n- `windows_10_22h2 < 10.0.19045.7184`\n- `windows_11_23h2 < 10.0.22631.6936`\n- `windows_11_24h2 < 10.0.26100.8246`\n- `windows_11_25h2 < 10.0.26200.8246`\n- `windows_11_26h1 < 10.0.28000.1836`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_10_21h2 10.0.19044.7184`\n- `windows_10_22h2 10.0.19045.7184`\n- `windows_11_23h2 10.0.22631.6936`\n- `windows_11_24h2 10.0.26100.8246`\n- `windows_11_25h2 10.0.26200.8246`\n- `windows_11_26h1 10.0.28000.1836`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}