{"id":"CVE-2023-21674","aliases":["EUVD-2023-25841","GHSA-hqxf-h392-6m7w"],"status":"published","title":"Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability","description":"Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.34206,"percentile":0.98418,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-416"],"published":"2023-01-10T00:00:00Z","modified":"2026-06-17T05:33:36Z","kev":{"date_added":"2023-01-10","due_date":"2023-01-31","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2023-01-10"},{"source":"kev","since":"2023-01-10"}],"exploits":[{"source":"pocgithub","id":"hd3s5aa/CVE-2023-21674","title":"hd3s5aa/CVE-2023-21674","date":"2024-03-07","url":"https://github.com/hd3s5aa/CVE-2023-21674"}],"products":[{"vendor":"microsoft","product":"windows"},{"vendor":"microsoft","product":"windows 10 version 1507"},{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 20h2"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 21h2"},{"vendor":"microsoft","product":"windows 11 version 22h2"},{"vendor":"microsoft","product":"windows 8.1"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 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Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-21674"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21674"},{"url":"https://github.com/advisories/GHSA-hqxf-h392-6m7w"}],"sources":{"cve":[{"id":"CVE-2023-21674","title":"Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability","description":"Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability","status":"published","published":"2023-01-10T00:00:00Z","modified":"2025-10-21T23:15:28.774Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:35:20.368244Z"}],"euvd":[{"id":"EUVD-2023-25841","description":"Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege 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