{"id":"CVE-2018-8449","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-8449","generatedAt":"2026-10-29T01:46:44.644Z","title":"A security feature bypass exists when Device Guard incorrectly validates an untrusted file, aka \"Device Guard Security Feature Bypass Vulnerability.\" This affects Windows Server 2016, Windows 10, Windows 10 Servers.","description":"A security feature bypass exists when Device Guard incorrectly validates an untrusted file, aka \"Device Guard Security Feature Bypass Vulnerability.\" This affects Windows Server 2016, Windows 10, Windows 10 Servers.","published":"2018-09-13T00:29:05.000Z","lastModified":"2026-06-17T02:04:54.000Z","status":"Modified","sourceIdentifier":"secure@microsoft.com","cvss":{"version":"3.0","score":3.3,"severity":"LOW","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},"cwe":["CWE-367"],"affected":["microsoft/windows 10","microsoft/windows server 2016"],"epss":{"score":0.03109,"percentile":0.87718,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.04234,"percentile":0.90603},{"date":"2026-09-22","score":0.03109,"percentile":0.87205}]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2018-09-19","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":45435,"kind":"exploit","title":"Microsoft Windows - 'CiSetFileCache' WDAC Security Feature Bypass TOCTOU","url":"https://www.exploit-db.com/exploits/45435","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/dos/45435.txt","file":"exploits/windows/dos/45435.txt","published":"2018-09-19","added":"2018-09-19","updated":"2018-09-19","author":"Google Security Research","type":"dos","platform":"windows","port":null,"verified":true,"codes":["CVE-2018-8449"],"tags":"Race Condition","aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://bugs.chromium.org/p/project-zero/issues/detail?id=1597"}]},"verdict":{"level":"high","text":"A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is low and EPSS is 3.1%. Treat it as high on anything reachable from the internet."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/105272","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://www.securitytracker.com/id/1041642","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8449","tags":["Patch","Vendor Advisory"],"source":"secure@microsoft.com"},{"url":"https://www.exploit-db.com/exploits/45435/","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://www.securityfocus.com/bid/105272","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1041642","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8449","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/45435/","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-8449","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."}