{"cve":"CVE-2018-8439","nvd":{"published":"2018-09-13T00:29:04.223","modified":"2026-06-17T02:04:52.503","status":"Modified","description":"A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system, aka \"Windows Hyper-V Remote Code Execution Vulnerability.\" This affects Windows Server 2012 R2, Windows RT 8.1, Windows Server 2016, Windows 8.1, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-0965.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","score":8.4},"cwes":["CWE-20"],"references":["http://www.securityfocus.com/bid/105233","http://www.securitytracker.com/id/1041624","https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8439","http://www.securityfocus.com/bid/105233","http://www.securitytracker.com/id/1041624"],"products":["microsoft:windows_10","microsoft:windows_8.1","microsoft:windows_rt_8.1","microsoft:windows_server_2012","microsoft:windows_server_2016"],"source":"nvd","synced_at":"2026-10-19T20:53:14.491561039+00:00"},"epss":{"cve":"CVE-2018-8439","score":0.04309,"percentile":0.91157,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}