{"id":"CVE-2021-41379","title":"Windows Installer Elevation of Privilege Vulnerability","summary":"Windows Installer Elevation of Privilege Vulnerability","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-59","CWE-59"],"vendor":"microsoft","product":"windows_10_1507","affected":["windows_10_1507 < 10.0.10240.19119","windows_10_1607 < 10.0.14393.4770","windows_10_1809 < 10.0.17763.2300","windows_10_1909 < 10.0.18363.1916","windows_10_2004 < 10.0.19041.1348","windows_10_20h2 < 10.0.19042.1348","windows_10_21h1 < 10.0.19043.1348","windows_11_21h2 < 10.0.22000.318","windows_7","windows_8.1","windows_rt_8.1","windows_server_2004 < 10.0.19041.1348","windows_server_2008","windows_server_2008 = r2","windows_server_2012","windows_server_2012 = r2","windows_server_2016 < 10.0.14393.4770","windows_server_2019 < 10.0.17763.2300","windows_server_2022 < 10.0.20348.350","windows_server_20h2 < 10.0.19042.1348"],"patched":["windows_10_1507 10.0.10240.19119","windows_10_1607 10.0.14393.4770","windows_10_1809 10.0.17763.2300","windows_10_1909 10.0.18363.1916","windows_10_2004 10.0.19041.1348","windows_10_20h2 10.0.19042.1348","windows_10_21h1 10.0.19043.1348","windows_11_21h2 10.0.22000.318","windows_server_2004 10.0.19041.1348","windows_server_2016 10.0.14393.4770","windows_server_2019 10.0.17763.2300","windows_server_2022 10.0.20348.350","windows_server_20h2 10.0.19042.1348"],"published":"2021-11-10","updated":"2026-08-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-41379","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-41379","label":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41379","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-1308/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-41379","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","kev","in-the-wild"],"epss":0.19532,"epssPercentile":0.97313,"kev":true,"kevDateAdded":"2022-03-03","kevDueDate":"2022-03-17","kevRansomware":true,"exploited":true,"zeroDay":true,"ingestedAt":"2026-08-20T17:59:03.274Z","slug":"CVE-2021-41379","body":"## Overview\n\nWindows Installer Elevation of Privilege Vulnerability\n\n## Affected\n\n- `windows_10_1507 < 10.0.10240.19119`\n- `windows_10_1607 < 10.0.14393.4770`\n- `windows_10_1809 < 10.0.17763.2300`\n- `windows_10_1909 < 10.0.18363.1916`\n- `windows_10_2004 < 10.0.19041.1348`\n- `windows_10_20h2 < 10.0.19042.1348`\n- `windows_10_21h1 < 10.0.19043.1348`\n- `windows_11_21h2 < 10.0.22000.318`\n- `windows_7`\n- `windows_8.1`\n- `windows_rt_8.1`\n- `windows_server_2004 < 10.0.19041.1348`\n- `windows_server_2008`\n- `windows_server_2008 = r2`\n- `windows_server_2012`\n- `windows_server_2012 = r2`\n- `windows_server_2016 < 10.0.14393.4770`\n- `windows_server_2019 < 10.0.17763.2300`\n- `windows_server_2022 < 10.0.20348.350`\n- `windows_server_20h2 < 10.0.19042.1348`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_10_1507 10.0.10240.19119`\n- `windows_10_1607 10.0.14393.4770`\n- `windows_10_1809 10.0.17763.2300`\n- `windows_10_1909 10.0.18363.1916`\n- `windows_10_2004 10.0.19041.1348`\n- `windows_10_20h2 10.0.19042.1348`\n- `windows_10_21h1 10.0.19043.1348`\n- `windows_11_21h2 10.0.22000.318`\n- `windows_server_2004 10.0.19041.1348`\n- `windows_server_2016 10.0.14393.4770`\n- `windows_server_2019 10.0.17763.2300`\n- `windows_server_2022 10.0.20348.350`\n- `windows_server_20h2 10.0.19042.1348`","depth":"midnight","depthScore":64,"depthScoreParts":{"impact":30.3,"likelihood":3.9,"exploitation":25,"ransomware":5},"changes":[]}