{"id":"CVE-2021-34471","aliases":["EUVD-2021-21126","GHSA-935j-gr9x-5v25"],"status":"published","title":"Microsoft Defender Elevation of Privilege Vulnerability","description":"Microsoft Defender Elevation of Privilege Vulnerability","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00509,"percentile":0.4381,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269"],"published":"2021-08-12T18:11:48Z","modified":"2026-08-10T18:30:55Z","products":[{"vendor":"microsoft","product":"malware_protection_engine"},{"vendor":"microsoft","product":"microsoft malware protection engine"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34471","tags":["vendor-advisory","patch"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34471","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34471"},{"url":"https://github.com/advisories/GHSA-935j-gr9x-5v25"}],"sources":{"cve":[{"id":"CVE-2021-34471","title":"Microsoft Defender Elevation of Privilege Vulnerability","description":"Microsoft Defender Elevation of Privilege Vulnerability","status":"published","published":"2021-08-12T18:11:48Z","modified":"2026-08-10T15:10:11.212Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21126","description":"Microsoft Defender Elevation of Privilege Vulnerability","status":"published","published":"2021-08-12T18:11:48Z","modified":"2026-08-10T15:10:11Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T18:02:05.388264Z"}],"ghsa":[{"id":"GHSA-935j-gr9x-5v25","title":"Microsoft Windows Defender Elevation of Privilege Vulnerability","description":"Microsoft Windows Defender Elevation of Privilege Vulnerability","status":"published","published":"2022-05-24T19:10:53Z","modified":"2026-08-10T18:30:55Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T15:10:14.704025Z"}],"nvd":[{"id":"CVE-2021-34471","description":"Microsoft Defender Elevation of Privilege Vulnerability","status":"published","published":"2021-08-12T18:15:08.967Z","modified":"2026-08-10T16:17:48.753Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:06:56.943671Z"}]}}