{"id":"CVE-2017-0021","aliases":["EUVD-2017-0388","GHSA-53gh-w7rv-pj62"],"status":"published","title":"Hyper-V in Microsoft Windows 10 1607 and Windows Server 2016 does not properly validate vSMB...","description":"Hyper-V in Microsoft Windows 10 1607 and Windows Server 2016 does not properly validate vSMB packet data, which allows attackers to execute arbitrary code on a target OS, aka \"Hyper-V System Data Structure Vulnerability.\" This vulnerability is different from that described in CVE-2017-0095.","severity":{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01776,"percentile":0.78353,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2017-03-17T00:00:00Z","modified":"2026-06-17T00:56:56Z","products":[{"vendor":"microsoft","product":"windows_10"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft corporation","product":"hyper-v vsmb"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0021","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Patch","Vendor Advisory"]},{"url":"http://www.securitytracker.com/id/1037999","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://www.securityfocus.com/bid/96020","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-0021"},{"url":"https://github.com/advisories/GHSA-53gh-w7rv-pj62"}],"sources":{"cve":[{"id":"CVE-2017-0021","description":"Hyper-V in Microsoft Windows 10 1607 and Windows Server 2016 does not properly validate vSMB packet data, which allows attackers to execute arbitrary code on a target OS, aka \"Hyper-V System Data Structure Vulnerability.\" This vulnerability is different from that described in CVE-2017-0095.","status":"published","published":"2017-03-17T00:00:00Z","modified":"2024-08-05T12:47:57.593Z","updated_at":"2026-11-02T14:33:22.699876Z"}],"euvd":[{"id":"EUVD-2017-0388","description":"Hyper-V in Microsoft Windows 10 1607 and Windows Server 2016 does not properly validate vSMB packet data, which allows attackers to execute arbitrary code on a target OS, aka \"Hyper-V System Data Structure Vulnerability.\" This vulnerability is different from that described in CVE-2017-0095.","status":"published","published":"2017-03-17T00:00:00Z","modified":"2024-08-05T12:47:57Z","updated_at":"2026-11-03T02:39:25.8334Z"}],"ghsa":[{"id":"GHSA-53gh-w7rv-pj62","title":"Hyper-V in Microsoft Windows 10 1607 and Windows Server 2016 does not properly validate vSMB...","description":"Hyper-V in Microsoft Windows 10 1607 and Windows Server 2016 does not properly validate vSMB packet data, which allows attackers to execute arbitrary code on a target OS, aka \"Hyper-V System Data Structure Vulnerability.\" This vulnerability is different from that described in CVE-2017-0095.","status":"published","published":"2022-05-13T01:39:44Z","modified":"2023-02-02T05:00:28Z","cvss":[{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T14:50:58.133799Z"}],"nvd":[{"id":"CVE-2017-0021","description":"Hyper-V in Microsoft Windows 10 1607 and Windows Server 2016 does not properly validate vSMB packet data, which allows attackers to execute arbitrary code on a target OS, aka \"Hyper-V System Data Structure Vulnerability.\" This vulnerability is different from that described in CVE-2017-0095.","status":"published","published":"2017-03-17T00:59:00.65Z","modified":"2026-06-17T00:56:56.35Z","cvss":[{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.7,"vector":"AV:A/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:03:44.275273Z"}]}}