{"id":"CVE-2018-8589","aliases":["EUVD-2018-20204","GHSA-67qx-v8w9-q5x5"],"status":"published","title":"An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k...","description":"An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys, aka \"Windows Win32k Elevation of Privilege Vulnerability.\" This affects Windows Server 2008, Windows 7, Windows Server 2008 R2.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03023,"percentile":0.87547,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"published":"2018-11-14T01:00:00Z","modified":"2026-06-17T02:05:09Z","kev":{"date_added":"2022-05-23","due_date":"2022-06-13","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2022-05-23"},{"source":"kev","since":"2022-05-23"}],"products":[{"vendor":"microsoft","product":"win32k"},{"vendor":"microsoft","product":"windows 7"},{"vendor":"microsoft","product":"windows server 2008"},{"vendor":"microsoft","product":"windows server 2008 r2"},{"vendor":"microsoft","product":"windows_7"},{"vendor":"microsoft","product":"windows_server_2008"}],"references":[{"url":"http://www.securityfocus.com/bid/105796","tags":["vdb-entry","x_refsource_BID","x_transferred","Broken Link","Third Party Advisory","VDB Entry"]},{"url":"http://www.securitytracker.com/id/1042140","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8589","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8589","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-8589"},{"url":"https://github.com/advisories/GHSA-67qx-v8w9-q5x5"}],"sources":{"cve":[{"id":"CVE-2018-8589","description":"An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys, aka \"Windows Win32k Elevation of Privilege Vulnerability.\" This affects Windows Server 2008, Windows 7, Windows Server 2008 R2.","status":"published","published":"2018-11-14T01:00:00Z","modified":"2025-10-21T23:45:47.156Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"updated_at":"2026-11-02T14:35:04.540365Z"}],"euvd":[{"id":"EUVD-2018-20204","description":"An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys, aka \"Windows Win32k Elevation of Privilege Vulnerability.\" This affects Windows Server 2008, Windows 7, Windows Server 2008 R2.","status":"published","published":"2018-11-14T01:00:00Z","modified":"2025-10-21T23:45:47Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"exploited_since":"2022-05-23","updated_at":"2026-11-02T20:31:24.172282Z"}],"ghsa":[{"id":"GHSA-67qx-v8w9-q5x5","title":"An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k...","description":"An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys, aka \"Windows Win32k Elevation of Privilege Vulnerability.\" This affects Windows Server 2008, Windows 7, Windows Server 2008 R2.","status":"published","published":"2022-05-13T01:53:46Z","modified":"2025-10-22T00:31:36Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:04:04.176931Z"}],"kev":[{"id":"CVE-2018-8589","title":"Microsoft Win32k Privilege Escalation Vulnerability","description":"A privilege escalation vulnerability exists when Windows improperly handles calls to Win32k.sys. An attacker who successfully exploited this vulnerability could run remote code in the security context of the local system.","kev":{"date_added":"2022-05-23","due_date":"2022-06-13","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.541131Z"}],"nvd":[{"id":"CVE-2018-8589","description":"An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys, aka \"Windows Win32k Elevation of Privilege Vulnerability.\" This affects Windows Server 2008, Windows 7, Windows Server 2008 R2.","status":"published","published":"2018-11-14T01:29:02.067Z","modified":"2026-06-17T02:05:09.51Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:04:47.196456Z"}]}}