{"id":"CVE-2021-42278","aliases":[],"url":"https://o3.security/vulnerability/CVE-2021-42278","summary":"Active Directory Domain Services Elevation of Privilege Vulnerability","details":"Active Directory Domain Services Elevation of Privilege Vulnerability","published":"2021-11-10T01:19:44.300","modified":"2026-08-19T19:22:57.137","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.72027,"percentile":0.99381,"asOf":"2026-08-27"},"cisaKev":{"dateAdded":"2022-04-11","dueDate":"2022-05-02","knownRansomwareCampaignUse":true},"exploitsKnown":12,"affectedPackages":[],"fix":null,"references":[{"type":"FIX","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42278"},{"type":"FIX","url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42278"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42278"}],"provenance":{"sources":["OSV.dev","NVD","CISA KEV","FIRST.org (EPSS)"],"lastVerified":"2026-08-19T19:22:57.137"}}