{"id":"CVE-2021-40449","aliases":[],"url":"https://o3.security/vulnerability/CVE-2021-40449","summary":"Win32k Elevation of Privilege Vulnerability","details":"Win32k Elevation of Privilege Vulnerability","published":"2021-10-13T01:15:09.703","modified":"2026-06-17T04:06:56.427","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.74129,"percentile":0.9946,"asOf":"2026-09-16"},"cisaKev":{"dateAdded":"2021-11-17","dueDate":"2021-12-01","knownRansomwareCampaignUse":true},"exploitsKnown":18,"affectedPackages":[],"fix":null,"references":[{"type":"EXPLOIT","url":"http://packetstormsecurity.com/files/164926/Win32k-NtGdiResetDC-Use-After-Free-Local-Privilege-Escalation.html"},{"type":"FIX","url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449"},{"type":"EXPLOIT","url":"http://packetstormsecurity.com/files/164926/Win32k-NtGdiResetDC-Use-After-Free-Local-Privilege-Escalation.html"},{"type":"FIX","url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40449"}],"provenance":{"sources":["OSV.dev","NVD","CISA KEV","FIRST.org (EPSS)"],"lastVerified":"2026-06-17T04:06:56.427"}}