{"id":"CVE-2018-8355","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-8355","generatedAt":"2026-10-28T20:08:43.699Z","title":"A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers, aka \"Scripting Engine Memory Corruption Vulnerability.\" This affects ChakraCore, Internet Explorer 11, Microsoft Edge.","description":"A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers, aka \"Scripting Engine Memory Corruption Vulnerability.\" This affects ChakraCore, Internet Explorer 11, Microsoft Edge. This CVE ID is unique from CVE-2018-8353, CVE-2018-8359, CVE-2018-8371, CVE-2018-8372, CVE-2018-8373, CVE-2018-8385, CVE-2018-8389, CVE-2018-8390.","published":"2018-08-15T17:29:06.000Z","lastModified":"2026-06-17T02:04:42.000Z","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","microsoft/chakracore","microsoft/edge"],"epss":{"score":0.67896,"percentile":0.99318,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.62501,"percentile":0.99179},{"date":"2026-09-22","score":0.68242,"percentile":0.99297}]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2018-09-18","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":45432,"kind":"exploit","title":"Microsoft Edge Chakra JIT - 'localeCompare' Type Confusion","url":"https://www.exploit-db.com/exploits/45432","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/dos/45432.js","file":"exploits/windows/dos/45432.js","published":"2018-09-18","added":"2018-09-18","updated":"2018-09-18","author":"Google Security Research","type":"dos","platform":"windows","port":null,"verified":true,"codes":["CVE-2018-8355"],"tags":"Type Confusion","aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1588"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 67.9%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-22T00:00:00.000Z","detail":{"to":0.68242,"from":0.62501,"percentile":0.99297},"summary":"EPSS moved from 62.5% to 68.2% probability of exploitation in the next thirty days."}],"references":[{"url":"http://www.securityfocus.com/bid/104978","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://www.securitytracker.com/id/1041457","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8355","tags":["Patch","Vendor Advisory"],"source":"secure@microsoft.com"},{"url":"https://www.exploit-db.com/exploits/45432/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://www.securityfocus.com/bid/104978","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1041457","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8355","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/45432/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-8355","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."}