{"id":"CVE-2018-8631","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-8631","generatedAt":"2026-10-28T21:30:25.304Z","title":"A remote code execution vulnerability exists when Internet Explorer improperly accesses objects in memory, aka \"Internet Explorer Memory Corruption Vulnerability.\" This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10.","description":"A remote code execution vulnerability exists when Internet Explorer improperly accesses objects in memory, aka \"Internet Explorer Memory Corruption Vulnerability.\" This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10.","published":"2018-12-12T00:29:02.000Z","lastModified":"2026-06-17T02:05:14.000Z","status":"Modified","sourceIdentifier":"secure@microsoft.com","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-787"],"affected":["microsoft/internet explorer"],"epss":{"score":0.68493,"percentile":0.99333,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.65664,"percentile":0.99257},{"date":"2026-09-22","score":0.68493,"percentile":0.99303}]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2018-12-18","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":46001,"kind":"exploit","title":"Microsoft Windows - 'jscript!JsArrayFunctionHeapSort' Out-of-Bounds Write","url":"https://www.exploit-db.com/exploits/46001","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/dos/46001.html","file":"exploits/windows/dos/46001.html","published":"2018-12-18","added":"2018-12-18","updated":"2018-12-18","author":"Google Security Research","type":"dos","platform":"windows","port":null,"verified":true,"codes":["CVE-2018-8631"],"tags":"Out Of Bounds","aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1684"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 68.5%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/106118","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8631","tags":["Patch","Vendor Advisory"],"source":"secure@microsoft.com"},{"url":"https://www.exploit-db.com/exploits/46001/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://www.securityfocus.com/bid/106118","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8631","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/46001/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-8631","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}