{"id":"CVE-2021-34486","title":"Windows Event Tracing Elevation of Privilege Vulnerability","summary":"Windows Event Tracing Elevation of Privilege Vulnerability","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416","CWE-416"],"vendor":"microsoft","product":"windows_10_1809","affected":["windows_10_1809 < 10.0.17763.2114","windows_10_1909 < 10.0.18363.1734","windows_10_2004 < 10.0.19041.1165","windows_10_20h2 < 10.0.19042.1165","windows_10_21h1 < 10.0.19043.1165","windows_server_2004 < 10.0.19041.1165","windows_server_2019 < 10.0.17763.2114","windows_server_20h2 < 10.0.19042.1165"],"patched":["windows_10_1809 10.0.17763.2114","windows_10_1909 10.0.18363.1734","windows_10_2004 10.0.19041.1165","windows_10_20h2 10.0.19042.1165","windows_10_21h1 10.0.19043.1165","windows_server_2004 10.0.19041.1165","windows_server_2019 10.0.17763.2114","windows_server_20h2 10.0.19042.1165"],"published":"2021-08-12","updated":"2026-08-10","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-34486","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34486","label":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34486","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-34486","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","kev","in-the-wild","exploit-available"],"epss":0.09253,"epssPercentile":0.95187,"kev":true,"kevDateAdded":"2022-03-28","kevDueDate":"2022-04-18","kevRansomware":false,"exploited":true,"ingestedAt":"2026-08-11T16:47:01.101Z","exploits":{"github":2,"githubRepos":["https://github.com/KaLendsi/CVE-2021-34486","https://github.com/b1tg/CVE-2021-34486-exp"],"checkedAt":"2026-09-21T15:24:23.610Z"},"exploitAvailable":true,"slug":"CVE-2021-34486","body":"## Overview\n\nWindows Event Tracing Elevation of Privilege Vulnerability\n\n## Affected\n\n- `windows_10_1809 < 10.0.17763.2114`\n- `windows_10_1909 < 10.0.18363.1734`\n- `windows_10_2004 < 10.0.19041.1165`\n- `windows_10_20h2 < 10.0.19042.1165`\n- `windows_10_21h1 < 10.0.19043.1165`\n- `windows_server_2004 < 10.0.19041.1165`\n- `windows_server_2019 < 10.0.17763.2114`\n- `windows_server_20h2 < 10.0.19042.1165`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_10_1809 10.0.17763.2114`\n- `windows_10_1909 10.0.18363.1734`\n- `windows_10_2004 10.0.19041.1165`\n- `windows_10_20h2 10.0.19042.1165`\n- `windows_10_21h1 10.0.19043.1165`\n- `windows_server_2004 10.0.19041.1165`\n- `windows_server_2019 10.0.17763.2114`\n- `windows_server_20h2 10.0.19042.1165`","depth":"abyssal","depthScore":70,"depthScoreParts":{"impact":42.9,"likelihood":1.9,"exploitation":25,"ransomware":0},"changes":[{"seq":4525,"id":"CVE-2021-34486","ts":1788887187704,"field":"exploit_available","old":"false","new":"true"},{"seq":3408,"id":"CVE-2021-34486","ts":1788886305379,"field":"exploit_available","old":"true","new":"false"},{"seq":2263,"id":"CVE-2021-34486","ts":1788882974871,"field":"exploit_available","old":"false","new":"true"},{"seq":1292,"id":"CVE-2021-34486","ts":1788882386682,"field":"exploit_available","old":"true","new":"false"},{"seq":406,"id":"CVE-2021-34486","ts":1788881822436,"field":"exploit_available","old":"false","new":"true"}]}