{"id":"CVE-2021-34466","aliases":["EUVD-2021-21121","GHSA-h9g5-22cm-hm27"],"status":"published","title":"Windows Hello Security Feature Bypass Vulnerability","description":"Windows Hello Security Feature Bypass Vulnerability","severity":{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00807,"percentile":0.57264,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-290","CWE-863"],"published":"2021-07-16T20:19:52Z","modified":"2026-08-10T18:31:53Z","products":[{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 1909"},{"vendor":"microsoft","product":"windows 10 version 2004"},{"vendor":"microsoft","product":"windows 10 version 20h2"},{"vendor":"microsoft","product":"windows 10 version 21h1"},{"vendor":"microsoft","product":"windows_10"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34466","tags":["vendor-advisory","patch"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34466","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34466"},{"url":"https://github.com/advisories/GHSA-h9g5-22cm-hm27"}],"sources":{"cve":[{"id":"CVE-2021-34466","title":"Windows Hello Security Feature Bypass Vulnerability","description":"Windows Hello Security Feature Bypass Vulnerability","status":"published","published":"2021-07-16T20:19:52Z","modified":"2026-08-10T15:12:01.167Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21121","description":"Windows Hello Security Feature Bypass Vulnerability","status":"published","published":"2021-07-16T20:19:52Z","modified":"2026-08-10T15:12:01Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T18:02:03.704262Z"}],"ghsa":[{"id":"GHSA-h9g5-22cm-hm27","title":"Windows Hello Security Feature Bypass Vulnerability","description":"Windows Hello Security Feature Bypass Vulnerability","status":"published","published":"2022-05-24T19:08:14Z","modified":"2026-08-10T18:31:53Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"cwes":["CWE-290","CWE-863"],"updated_at":"2026-11-02T15:10:15.270288Z"}],"nvd":[{"id":"CVE-2021-34466","description":"Windows Hello Security Feature Bypass Vulnerability","status":"published","published":"2021-07-16T21:15:10.07Z","modified":"2026-08-10T16:17:48.117Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":3.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-290"],"updated_at":"2026-11-02T14:06:55.747384Z"}]}}