{"id":"CVE-2021-28476","aliases":["EUVD-2021-15154","GHSA-j6pv-9pg5-vg52"],"status":"published","title":"Windows Hyper-V Remote Code Execution Vulnerability","description":"Windows Hyper-V Remote Code Execution Vulnerability","severity":{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.39226,"percentile":0.98614,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2021-05-11T19:11:17Z","modified":"2026-06-17T03:46:25Z","exploits":[{"source":"pocgithub","id":"0vercl0k/CVE-2021-28476","title":"0vercl0k/CVE-2021-28476","date":"2021-05-31","url":"https://github.com/0vercl0k/CVE-2021-28476"},{"source":"pocgithub","id":"LaCeeKa/CVE-2021-28476-tools-env","title":"LaCeeKa/CVE-2021-28476-tools-env","date":"2021-08-15","url":"https://github.com/LaCeeKa/CVE-2021-28476-tools-env"},{"source":"pocgithub","id":"australeo/CVE-2021-28476","title":"australeo/CVE-2021-28476","date":"2022-01-16","url":"https://github.com/australeo/CVE-2021-28476"},{"source":"pocgithub","id":"bluefrostsecurity/CVE-2021-28476","title":"bluefrostsecurity/CVE-2021-28476","date":"2021-06-02","url":"https://github.com/bluefrostsecurity/CVE-2021-28476"},{"source":"pocgithub","id":"dengyang123x/0vercl0k","title":"dengyang123x/0vercl0k","date":"2022-04-17","url":"https://github.com/dengyang123x/0vercl0k"}],"products":[{"vendor":"microsoft","product":"windows 10 version 1507"},{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1803"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 1909"},{"vendor":"microsoft","product":"windows 10 version 2004"},{"vendor":"microsoft","product":"windows 7 service pack 1"},{"vendor":"microsoft","product":"windows 8.1"},{"vendor":"microsoft","product":"windows server 2008  service pack 2"},{"vendor":"microsoft","product":"windows server 2008 r2 service pack 1"},{"vendor":"microsoft","product":"windows server 2008 r2 service pack 1 (server core installation)"},{"vendor":"microsoft","product":"windows server 2008 service pack 2 (server core installation)"},{"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 version 2004"},{"vendor":"microsoft","product":"windows server version 20h2"},{"vendor":"microsoft","product":"windows server, version 1909 (server core installation)"},{"vendor":"microsoft","product":"windows_10"},{"vendor":"microsoft","product":"windows_7"},{"vendor":"microsoft","product":"windows_8.1"},{"vendor":"microsoft","product":"windows_server_2008"},{"vendor":"microsoft","product":"windows_server_2012"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28476","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/163497/Microsoft-Hyper-V-vmswitch.sys-Proof-Of-Concept.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-28476"},{"url":"https://github.com/advisories/GHSA-j6pv-9pg5-vg52"}],"sources":{"cve":[{"id":"CVE-2021-28476","title":"Windows Hyper-V Remote Code Execution Vulnerability","description":"Windows Hyper-V Remote Code Execution Vulnerability","status":"published","published":"2021-05-11T19:11:17Z","modified":"2024-08-03T21:47:32.644Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"updated_at":"2026-11-02T14:33:09.175141Z"}],"euvd":[{"id":"EUVD-2021-15154","description":"Windows Hyper-V Remote Code Execution Vulnerability","status":"published","published":"2021-05-11T19:11:17Z","modified":"2024-08-03T21:47:32Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-03T03:24:46.751124Z"}],"ghsa":[{"id":"GHSA-j6pv-9pg5-vg52","title":"Hyper-V Remote Code Execution Vulnerability","description":"Hyper-V Remote Code Execution Vulnerability","status":"published","published":"2022-05-24T19:02:03Z","modified":"2023-01-29T05:07:36Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T14:46:10.663769Z"}],"nvd":[{"id":"CVE-2021-28476","description":"Windows Hyper-V Remote Code Execution Vulnerability","status":"published","published":"2021-05-11T19:15:09.133Z","modified":"2026-06-17T03:46:25.857Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:53.343329Z"}]}}