{"id":"CVE-2026-119959","aliases":["EUVD-2026-122131","GHSA-727p-595q-jg28"],"status":"published","title":"Windows Hyper-V Spoofing Vulnerability","description":"Improper access control in Windows Hyper-V allows an authorized attacker to perform spoofing locally.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-14","score":0.00305,"percentile":0.23581,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-290"],"published":"2026-11-10T18:20:41Z","modified":"2026-11-10T21:33:40Z","products":[{"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 11 version 26h2"},{"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)"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119959","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119959"},{"url":"https://github.com/advisories/GHSA-727p-595q-jg28"}],"sources":{"cve":[{"id":"CVE-2026-119959","title":"Windows Hyper-V Spoofing Vulnerability","description":"Improper access control in Windows Hyper-V allows an authorized attacker to perform spoofing locally.","status":"published","published":"2026-11-10T18:20:41.905Z","modified":"2026-11-13T18:09:27.768Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-290"],"updated_at":"2026-11-10T19:39:58.973959Z"}],"euvd":[{"id":"EUVD-2026-122131","description":"Improper access control in Windows Hyper-V allows an authorized attacker to perform spoofing locally.","status":"published","published":"2026-11-10T18:20:41Z","modified":"2026-11-13T18:09:27Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-11T00:25:04.029196Z"}],"ghsa":[{"id":"GHSA-727p-595q-jg28","title":"Improper access control in Windows Hyper-V allows an authorized attacker to perform spoofing...","description":"Improper access control in Windows Hyper-V allows an authorized attacker to perform spoofing locally.","status":"published","published":"2026-11-10T21:33:39Z","modified":"2026-11-10T21:33:40Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-290"],"updated_at":"2026-11-10T21:57:53.692707Z"}],"nvd":[{"id":"CVE-2026-119959","description":"Improper access control in Windows Hyper-V allows an authorized attacker to perform spoofing locally.","status":"published","published":"2026-11-10T19:20:20.073Z","modified":"2026-11-10T19:20:20.213Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-290"],"updated_at":"2026-11-10T22:21:33.392456Z"}]}}