{"id":"CVE-2021-26416","aliases":["EUVD-2021-13222","GHSA-6378-3f5f-72ch"],"status":"published","title":"Windows Hyper-V Denial of Service Vulnerability","description":"Windows Hyper-V Denial of Service Vulnerability","severity":{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.04201,"percentile":0.91037,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-04-13T19:32:34Z","modified":"2026-06-17T03:43:22Z","products":[{"vendor":"microsoft","product":"windows 10 version 1607"},{"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 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_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26416","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26416"},{"url":"https://github.com/advisories/GHSA-6378-3f5f-72ch"}],"sources":{"cve":[{"id":"CVE-2021-26416","title":"Windows Hyper-V Denial of Service Vulnerability","description":"Windows Hyper-V Denial of Service Vulnerability","status":"published","published":"2021-04-13T19:32:34Z","modified":"2024-08-03T20:26:25.424Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:32:57.033395Z"}],"euvd":[{"id":"EUVD-2021-13222","description":"Windows Hyper-V Denial of Service Vulnerability","status":"published","published":"2021-04-13T19:32:34Z","modified":"2024-08-03T20:26:25Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-03T03:24:51.962182Z"}],"ghsa":[{"id":"GHSA-6378-3f5f-72ch","title":"Windows Hyper-V Denial of Service Vulnerability","description":"Windows Hyper-V Denial of Service Vulnerability","status":"published","published":"2022-05-24T17:47:15Z","modified":"2024-01-07T05:05:40Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T14:55:21.414754Z"}],"nvd":[{"id":"CVE-2021-26416","description":"Windows Hyper-V Denial of Service Vulnerability","status":"published","published":"2021-04-13T20:15:15.217Z","modified":"2026-06-17T03:43:22.203Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:06:51.610648Z"}]}}