{"id":"CVE-2021-36948","aliases":["EUVD-2021-23524","GHSA-fcr2-qx8m-pfhp"],"status":"published","title":"Windows Update Medic Service Elevation of Privilege Vulnerability","description":"Windows Update Medic Service 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:F/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.2327,"percentile":0.97805,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-269"],"published":"2021-08-12T18:12:37Z","modified":"2026-08-10T20:19:08Z","kev":{"date_added":"2021-11-03","due_date":"2021-11-17","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2021-11-03"},{"source":"kev","since":"2021-11-03"}],"products":[{"vendor":"microsoft","product":"windows"},{"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 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_10_1809"},{"vendor":"microsoft","product":"windows_10_1909"},{"vendor":"microsoft","product":"windows_10_2004"},{"vendor":"microsoft","product":"windows_10_20h2"},{"vendor":"microsoft","product":"windows_10_21h1"},{"vendor":"microsoft","product":"windows_server_2004"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_20h2"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36948","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36948","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-36948","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36948"},{"url":"https://github.com/advisories/GHSA-fcr2-qx8m-pfhp"}],"sources":{"cve":[{"id":"CVE-2021-36948","title":"Windows Update Medic Service Elevation of Privilege Vulnerability","description":"Windows Update Medic Service Elevation of Privilege Vulnerability","status":"published","published":"2021-08-12T18:12:37Z","modified":"2026-08-10T15:10:09.026Z","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:F/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:06.32268Z"}],"euvd":[{"id":"EUVD-2021-23524","description":"Windows Update Medic Service Elevation of Privilege Vulnerability","status":"published","published":"2021-08-12T18:12:37Z","modified":"2026-08-10T15:10:09Z","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:F/RL:O/RC:C","level":"high"}],"exploited_since":"2021-11-03","updated_at":"2026-11-02T18:02:05.388264Z"}],"ghsa":[{"id":"GHSA-fcr2-qx8m-pfhp","title":"Windows Update Medic Service Elevation of Privilege Vulnerability","description":"Windows Update Medic Service Elevation of Privilege Vulnerability","status":"published","published":"2022-05-24T19:10:50Z","modified":"2026-08-10T18:31:01Z","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"}],"kev":[{"id":"CVE-2021-36948","title":"Microsoft Windows Update Medic Service Privilege Escalation Vulnerability","description":"Microsoft Windows Update Medic Service contains an unspecified vulnerability that allows for privilege escalation.","kev":{"date_added":"2021-11-03","due_date":"2021-11-17","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:17.050017Z"}],"nvd":[{"id":"CVE-2021-36948","description":"Windows Update Medic Service Elevation of Privilege Vulnerability","status":"published","published":"2021-08-12T18:15:10.19Z","modified":"2026-08-10T20:19:08.12Z","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"}],"updated_at":"2026-11-02T14:06:56.943671Z"}]}}