{"id":"CVE-2018-8126","aliases":["EUVD-2018-19802","GHSA-mv59-m2pm-94rh"],"status":"published","title":"A security feature bypass vulnerability exists when Internet Explorer fails to validate User Mode...","description":"A security feature bypass vulnerability exists when Internet Explorer fails to validate User Mode Code Integrity (UMCI) policies, aka \"Internet Explorer Security Feature Bypass Vulnerability.\" This affects Internet Explorer 11.","severity":{"version":"3.0","score":8.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.055,"percentile":0.92839,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2018-05-09T19:00:00Z","modified":"2026-06-17T02:04:18Z","products":[{"vendor":"microsoft","product":"internet explorer 11"},{"vendor":"microsoft","product":"internet_explorer"}],"references":[{"url":"http://www.securityfocus.com/bid/103997","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://www.securitytracker.com/id/1040846","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8126","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-8126"},{"url":"https://github.com/advisories/GHSA-mv59-m2pm-94rh"}],"sources":{"cve":[{"id":"CVE-2018-8126","description":"A security feature bypass vulnerability exists when Internet Explorer fails to validate User Mode Code Integrity (UMCI) policies, aka \"Internet Explorer Security Feature Bypass Vulnerability.\" This affects Internet Explorer 11.","status":"published","published":"2018-05-09T19:00:00Z","modified":"2024-08-05T06:46:13.341Z","updated_at":"2026-11-02T14:35:04.172099Z"}],"euvd":[{"id":"EUVD-2018-19802","description":"A security feature bypass vulnerability exists when Internet Explorer fails to validate User Mode Code Integrity (UMCI) policies, aka \"Internet Explorer Security Feature Bypass Vulnerability.\" This affects Internet Explorer 11.","status":"published","published":"2018-05-09T19:00:00Z","modified":"2024-08-05T06:46:13Z","updated_at":"2026-11-03T02:40:04.215722Z"}],"ghsa":[{"id":"GHSA-mv59-m2pm-94rh","title":"A security feature bypass vulnerability exists when Internet Explorer fails to validate User Mode...","description":"A security feature bypass vulnerability exists when Internet Explorer fails to validate User Mode Code Integrity (UMCI) policies, aka \"Internet Explorer Security Feature Bypass Vulnerability.\" This affects Internet Explorer 11.","status":"published","published":"2022-05-13T01:53:31Z","modified":"2023-02-02T05:02:26Z","cvss":[{"version":"3.0","score":8.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:51:26.673587Z"}],"nvd":[{"id":"CVE-2018-8126","description":"A security feature bypass vulnerability exists when Internet Explorer fails to validate User Mode Code Integrity (UMCI) policies, aka \"Internet Explorer Security Feature Bypass Vulnerability.\" This affects Internet Explorer 11.","status":"published","published":"2018-05-09T19:29:01.463Z","modified":"2026-06-17T02:04:18.783Z","cvss":[{"version":"3.0","score":8.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:04:26.098615Z"}]}}