{"id":"CVE-2021-27085","aliases":["EUVD-2021-13856","GHSA-vm76-5x29-7jx8"],"status":"published","title":"Internet Explorer Remote Code Execution Vulnerability","description":"Internet Explorer Remote Code Execution Vulnerability","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L/E:P/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.05448,"percentile":0.92844,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"published":"2021-03-11T15:46:59Z","modified":"2026-08-19T19:22:43Z","kev":{"date_added":"2021-11-03","due_date":"2021-11-17","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2021-11-03"},{"source":"kev","since":"2021-11-03"}],"products":[{"vendor":"microsoft","product":"internet explorer"},{"vendor":"microsoft","product":"internet explorer 11"},{"vendor":"microsoft","product":"internet_explorer"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27085"},{"url":"https://github.com/advisories/GHSA-vm76-5x29-7jx8"}],"sources":{"cve":[{"id":"CVE-2021-27085","title":"Internet Explorer Remote Code Execution Vulnerability","description":"Internet Explorer Remote Code Execution Vulnerability","status":"published","published":"2021-03-11T15:46:59Z","modified":"2026-08-19T16:30:52.537Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L/E:P/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:04.360272Z"}],"euvd":[{"id":"EUVD-2021-13856","description":"Internet Explorer Remote Code Execution Vulnerability","status":"published","published":"2021-03-11T15:46:59Z","modified":"2026-08-19T16:30:52Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L/E:P/RL:O/RC:C","level":"high"}],"exploited_since":"2021-11-03","updated_at":"2026-11-02T18:01:42.411264Z"}],"ghsa":[{"id":"GHSA-vm76-5x29-7jx8","title":"Internet Explorer Remote Code Execution Vulnerability","description":"Internet Explorer Remote Code Execution Vulnerability","status":"published","published":"2022-05-24T17:44:25Z","modified":"2026-08-19T18:32:37Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L","level":"high"}],"updated_at":"2026-11-02T15:10:42.894447Z"}],"kev":[{"id":"CVE-2021-27085","title":"Microsoft Internet Explorer Remote Code Execution Vulnerability","description":"Microsoft Internet Explorer contains an unspecified vulnerability that allows for remote code execution.","kev":{"date_added":"2021-11-03","due_date":"2021-11-17","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:17.050017Z"}],"nvd":[{"id":"CVE-2021-27085","description":"Internet Explorer Remote Code Execution Vulnerability","status":"published","published":"2021-03-11T16:15:18.677Z","modified":"2026-08-19T19:22:43.24Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":7.6,"vector":"AV:N/AC:H/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:06:50.805771Z"}]}}