{"id":"CVE-2019-0721","aliases":["EUVD-2019-1481","GHSA-wgjq-j646-4ghv"],"status":"published","title":"A remote code execution vulnerability exists when Windows Hyper-V Network Switch on a host server...","description":"A remote code execution vulnerability exists when Windows Hyper-V Network Switch on a host server fails to properly validate input from an authenticated user on a guest operating system, aka 'Hyper-V Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-0719.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.12118,"percentile":0.9618,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2019-11-12T18:52:47Z","modified":"2026-06-17T02:08:46Z","products":[{"vendor":"microsoft","product":"windows"},{"vendor":"microsoft","product":"windows 10 version 1903 for x64-based systems"},{"vendor":"microsoft","product":"windows server"},{"vendor":"microsoft","product":"windows server, version 1903 (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-2019-0721","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-0721"},{"url":"https://github.com/advisories/GHSA-wgjq-j646-4ghv"}],"sources":{"cve":[{"id":"CVE-2019-0721","description":"A remote code execution vulnerability exists when Windows Hyper-V Network Switch on a host server fails to properly validate input from an authenticated user on a guest operating system, aka 'Hyper-V Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-0719.","status":"published","published":"2019-11-12T18:52:47Z","modified":"2024-08-04T17:51:27.295Z","updated_at":"2026-11-02T14:32:24.110857Z"}],"euvd":[{"id":"EUVD-2019-1481","description":"A remote code execution vulnerability exists when Windows Hyper-V Network Switch on a host server fails to properly validate input from an authenticated user on a guest operating system, aka 'Hyper-V Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-0719.","status":"published","published":"2019-11-12T18:52:47Z","modified":"2024-08-04T17:51:27Z","updated_at":"2026-11-03T03:07:00.558698Z"}],"ghsa":[{"id":"GHSA-wgjq-j646-4ghv","title":"A remote code execution vulnerability exists when Windows Hyper-V Network Switch on a host server...","description":"A remote code execution vulnerability exists when Windows Hyper-V Network Switch on a host server fails to properly validate input from an authenticated user on a guest operating system, aka 'Hyper-V Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-0719.","status":"published","published":"2022-05-24T22:01:08Z","modified":"2023-01-30T05:04:57Z","updated_at":"2026-11-02T14:47:10.094761Z"}],"nvd":[{"id":"CVE-2019-0721","description":"A remote code execution vulnerability exists when Windows Hyper-V Network Switch on a host server fails to properly validate input from an authenticated user on a guest operating system, aka 'Hyper-V Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-0719.","status":"published","published":"2019-11-12T19:15:11.177Z","modified":"2026-06-17T02:08:46.327Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:05:35.052973Z"}]}}