{"id":"CVE-2026-88071","aliases":["EUVD-2026-99647","GHSA-84cw-49qf-f58x"],"status":"published","title":"Windows Hyper-V Elevation of Privilege Vulnerability","description":"Double free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.","severity":{"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/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00312,"percentile":0.24274,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-415"],"published":"2026-10-13T19:00:16Z","modified":"2026-11-10T20:39:09Z","products":[{"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 26h2"},{"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_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h2"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88071","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88071"},{"url":"https://github.com/advisories/GHSA-84cw-49qf-f58x"}],"sources":{"cve":[{"id":"CVE-2026-88071","title":"Windows Hyper-V Elevation of Privilege Vulnerability","description":"Double free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:00:16.802Z","modified":"2026-11-10T20:39:09.821Z","cvss":[{"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/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-415"],"updated_at":"2026-11-10T22:18:29.471829Z"}],"euvd":[{"id":"EUVD-2026-99647","description":"Double free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:00:16Z","modified":"2026-11-10T20:39:09Z","cvss":[{"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/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T22:23:59.037992Z"}],"ghsa":[{"id":"GHSA-84cw-49qf-f58x","title":"Double free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.","description":"Double free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T21:36:31Z","modified":"2026-10-13T21:36:32Z","cvss":[{"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"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T15:13:18.544547Z"}],"nvd":[{"id":"CVE-2026-88071","description":"Double free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:21:25.717Z","modified":"2026-10-16T15:56:30.183Z","cvss":[{"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":"secondary"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T14:12:58.13117Z"}]}}