{"id":"CVE-2021-43246","aliases":["EUVD-2021-30190","GHSA-m9hw-3qvv-6hxr"],"status":"published","title":"Windows Hyper-V Denial of Service Vulnerability","description":"Windows Hyper-V Denial of Service Vulnerability","severity":{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00768,"percentile":0.56004,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2021-12-15T14:15:26Z","modified":"2026-06-17T04:10:44Z","products":[{"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 10 version 21h1"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 11 version 21h2"},{"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 version 2004"},{"vendor":"microsoft","product":"windows server version 20h2"},{"vendor":"microsoft","product":"windows_10"},{"vendor":"microsoft","product":"windows_server"},{"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-2021-43246","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43246"},{"url":"https://github.com/advisories/GHSA-m9hw-3qvv-6hxr"}],"sources":{"cve":[{"id":"CVE-2021-43246","title":"Windows Hyper-V Denial of Service Vulnerability","description":"Windows Hyper-V Denial of Service Vulnerability","status":"published","published":"2021-12-15T14:15:26Z","modified":"2024-08-04T03:55:28.311Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-30190","description":"Windows Hyper-V Denial of Service Vulnerability","status":"published","published":"2021-12-15T14:15:26Z","modified":"2024-08-04T03:55:28Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-03T03:24:14.245608Z"}],"ghsa":[{"id":"GHSA-m9hw-3qvv-6hxr","title":"Windows Hyper-V Denial of Service Vulnerability","description":"Windows Hyper-V Denial of Service Vulnerability","status":"published","published":"2021-12-16T00:01:49Z","modified":"2023-02-01T05:06:55Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:50:26.86128Z"}],"nvd":[{"id":"CVE-2021-43246","description":"Windows Hyper-V Denial of Service Vulnerability","status":"published","published":"2021-12-15T15:15:10.553Z","modified":"2026-06-17T04:10:44.033Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.9,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:02.189991Z"}]}}