{"id":"CVE-2026-54127","aliases":["EUVD-2026-43755","GHSA-86jj-hqjw-mj6h"],"status":"published","title":"Windows Hyper-V Elevation of Privilege Vulnerability","description":"Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/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":0.00305,"percentile":0.23463,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-07-14T17:05:14Z","modified":"2026-11-10T22:35:45Z","products":[{"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 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54127","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54127"},{"url":"https://github.com/advisories/GHSA-86jj-hqjw-mj6h"}],"sources":{"cve":[{"id":"CVE-2026-54127","title":"Windows Hyper-V Elevation of Privilege Vulnerability","description":"Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T17:05:14.656Z","modified":"2026-11-10T22:35:45.631Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-10T23:49:29.024872Z"}],"euvd":[{"id":"EUVD-2026-43755","description":"Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T17:05:14Z","modified":"2026-11-10T22:35:45Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:15.503335Z"}],"ghsa":[{"id":"GHSA-86jj-hqjw-mj6h","title":"Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.","description":"Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T18:32:07Z","modified":"2026-07-14T18:32:11Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:09:28.885137Z"}],"nvd":[{"id":"CVE-2026-54127","description":"Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.","status":"published","published":"2026-07-14T17:17:04.993Z","modified":"2026-07-22T16:18:14.873Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:12:29.489525Z"}]}}