{"id":"CVE-2026-72927","aliases":["EUVD-2026-73661","GHSA-87wg-6h8j-v8qh"],"status":"published","title":"Winsock Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Winsock allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00338,"percentile":0.27568,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-09-08T17:17:02Z","modified":"2026-11-10T21:36:05Z","products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 23h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows server 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_1607"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_server_2012"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72927","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72927"},{"url":"https://github.com/advisories/GHSA-87wg-6h8j-v8qh"}],"sources":{"cve":[{"id":"CVE-2026-72927","title":"Winsock Elevation of Privilege Vulnerability","description":"Heap-based buffer overflow in Winsock allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T17:17:02.866Z","modified":"2026-11-10T21:36:05.961Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-10T22:48:53.557052Z"}],"euvd":[{"id":"EUVD-2026-73661","description":"Heap-based buffer overflow in Winsock allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T17:17:02Z","modified":"2026-11-10T21:36:05Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-10T22:23:47.576985Z"}],"ghsa":[{"id":"GHSA-87wg-6h8j-v8qh","title":"Heap-based buffer overflow in Winsock allows an authorized attacker to elevate privileges locally.","description":"Heap-based buffer overflow in Winsock allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T18:33:10Z","modified":"2026-09-08T18:33:41Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:11:33.442964Z"}],"nvd":[{"id":"CVE-2026-72927","description":"Heap-based buffer overflow in Winsock allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-09-08T18:20:16.913Z","modified":"2026-09-24T23:18:46.407Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:45.264578Z"}]}}