{"id":"CVE-2021-27094","aliases":["EUVD-2021-13865","GHSA-pvhp-ff58-hqxh"],"status":"published","title":"Windows Early Launch Antimalware Driver Security Feature Bypass Vulnerability","description":"Windows Early Launch Antimalware Driver Security Feature Bypass Vulnerability","severity":{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01039,"percentile":0.64388,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-04-13T19:32:44Z","modified":"2026-06-17T03:44:16Z","products":[{"vendor":"microsoft","product":"windows 10 version 1507"},{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1803"},{"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 8.1"},{"vendor":"microsoft","product":"windows server 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server version 2004"},{"vendor":"microsoft","product":"windows server version 20h2"},{"vendor":"microsoft","product":"windows server, version 1909 (server core installation)"},{"vendor":"microsoft","product":"windows_10"},{"vendor":"microsoft","product":"windows_8.1"},{"vendor":"microsoft","product":"windows_rt_8.1"},{"vendor":"microsoft","product":"windows_server_2012"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27094","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://bi-zone.medium.com/measured-boot-and-malware-signatures-exploring-two-vulnerabilities-found-in-the-windows-loader-5a4fcc3c4b66","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27094"},{"url":"https://github.com/advisories/GHSA-pvhp-ff58-hqxh"}],"sources":{"cve":[{"id":"CVE-2021-27094","title":"Windows Early Launch Antimalware Driver Security Feature Bypass Vulnerability","description":"Windows Early Launch Antimalware Driver Security Feature Bypass Vulnerability","status":"published","published":"2021-04-13T19:32:44Z","modified":"2024-08-03T20:40:47.3Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:04.360272Z"}],"euvd":[{"id":"EUVD-2021-13865","description":"Windows Early Launch Antimalware Driver Security Feature Bypass Vulnerability","status":"published","published":"2021-04-13T19:32:44Z","modified":"2024-08-03T20:40:47Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-03T03:24:50.383074Z"}],"ghsa":[{"id":"GHSA-pvhp-ff58-hqxh","title":"Windows Early Launch Antimalware Driver Security Feature Bypass Vulnerability This CVE ID is...","description":"Windows Early Launch Antimalware Driver Security Feature Bypass Vulnerability This CVE ID is unique from CVE-2021-28447.","status":"published","published":"2022-05-24T17:47:17Z","modified":"2024-01-07T05:05:29Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T14:55:20.878476Z"}],"nvd":[{"id":"CVE-2021-27094","description":"Windows Early Launch Antimalware Driver Security Feature Bypass Vulnerability","status":"published","published":"2021-04-13T20:15:16.03Z","modified":"2026-06-17T03:44:16.743Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:06:51.610648Z"}]}}