{"id":"CVE-2021-26411","title":"Internet Explorer Memory Corruption Vulnerability","summary":"Internet Explorer Memory Corruption Vulnerability","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L","cwe":["CWE-416","CWE-416"],"vendor":"microsoft","product":"edge","affected":["edge","internet_explorer = 11","internet_explorer = 9"],"published":"2021-03-11","updated":"2026-08-12","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-26411","references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26411","label":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26411","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26411","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","kev","in-the-wild","exploit-available"],"epss":0.80765,"epssPercentile":0.9962,"kev":true,"kevDateAdded":"2021-11-03","kevDueDate":"2021-11-17","kevRansomware":true,"exploited":true,"zeroDay":true,"ingestedAt":"2026-08-12T19:54:25.780Z","exploits":{"github":1,"githubRepos":["https://github.com/CrackerCat/CVE-2021-26411"],"checkedAt":"2026-09-21T15:24:11.177Z"},"exploitAvailable":true,"slug":"CVE-2021-26411","body":"## Overview\n\nInternet Explorer Memory Corruption Vulnerability\n\n## Affected\n\n- `edge`\n- `internet_explorer = 11`\n- `internet_explorer = 9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":95,"depthScoreParts":{"impact":48.4,"likelihood":16.2,"exploitation":25,"ransomware":5},"changes":[{"seq":4511,"id":"CVE-2021-26411","ts":1788887186252,"field":"exploit_available","old":"false","new":"true"},{"seq":3394,"id":"CVE-2021-26411","ts":1788886303961,"field":"exploit_available","old":"true","new":"false"},{"seq":2249,"id":"CVE-2021-26411","ts":1788882973575,"field":"exploit_available","old":"false","new":"true"},{"seq":1278,"id":"CVE-2021-26411","ts":1788882385255,"field":"exploit_available","old":"true","new":"false"},{"seq":392,"id":"CVE-2021-26411","ts":1788881820605,"field":"exploit_available","old":"false","new":"true"}]}