{"id":"CVE-2021-26411","aliases":["EUVD-2021-13217","GHSA-c5rh-mmr6-c7ch"],"status":"published","title":"Internet Explorer Memory Corruption Vulnerability","description":"Internet Explorer Memory Corruption 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":"2026-11-11","score":0.81667,"percentile":0.99648,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-119","CWE-416","CWE-787"],"published":"2021-03-11T15:07:28Z","modified":"2026-10-01T21:17:16Z","kev":{"date_added":"2021-11-03","due_date":"2021-11-17","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"exploitation":[{"source":"euvd","since":"2021-11-03"},{"source":"kev","since":"2021-11-03"}],"exploits":[{"source":"pocgithub","id":"CrackerCat/CVE-2021-26411","title":"CrackerCat/CVE-2021-26411","date":"2021-11-22","url":"https://github.com/CrackerCat/CVE-2021-26411"}],"products":[{"vendor":"microsoft","product":"edge"},{"vendor":"microsoft","product":"internet explorer"},{"vendor":"microsoft","product":"internet explorer 11"},{"vendor":"microsoft","product":"internet explorer 9"},{"vendor":"microsoft","product":"internet_explorer"},{"vendor":"microsoft","product":"microsoft edge (edgehtml-based)"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26411","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26411","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26411","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26411"},{"url":"https://github.com/advisories/GHSA-c5rh-mmr6-c7ch"}],"sources":{"cve":[{"id":"CVE-2021-26411","title":"Internet Explorer Memory Corruption Vulnerability","description":"Internet Explorer Memory Corruption Vulnerability","status":"published","published":"2021-03-11T15:07:28Z","modified":"2026-10-01T20:31:07.692Z","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"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:32:57.368269Z"}],"euvd":[{"id":"EUVD-2021-13217","description":"Internet Explorer Memory Corruption Vulnerability","status":"published","published":"2021-03-11T15:07:28Z","modified":"2026-10-01T20:31:07Z","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":"2026-11-02T17:27:43.593551Z"}],"ghsa":[{"id":"GHSA-c5rh-mmr6-c7ch","title":"Internet Explorer Memory Corruption Vulnerability","description":"Internet Explorer Memory Corruption Vulnerability","status":"published","published":"2022-05-24T22:01:28Z","modified":"2026-08-19T18:31:29Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-119","CWE-416","CWE-787"],"updated_at":"2026-11-02T15:10:40.42434Z"}],"kev":[{"id":"CVE-2021-26411","title":"Microsoft Internet Explorer Memory Corruption Vulnerability","description":"Microsoft Internet Explorer contains an unspecified vulnerability that allows for memory corruption.","cwes":["CWE-416"],"kev":{"date_added":"2021-11-03","due_date":"2021-11-17","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"updated_at":"2026-11-02T17:00:17.050017Z"}],"nvd":[{"id":"CVE-2021-26411","description":"Internet Explorer Memory Corruption Vulnerability","status":"published","published":"2021-03-11T16:15:13.863Z","modified":"2026-10-01T21:17:16.54Z","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":5.1,"vector":"AV:N/AC:H/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:06:50.805771Z"}]}}