{"id":"CVE-2018-4423","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-4423","generatedAt":"2026-10-28T22:13:03.695Z","title":"A logic issue was addressed with improved validation.","description":"A logic issue was addressed with improved validation. This issue affected versions prior to macOS Mojave 10.14.1.","published":"2019-04-03T18:29:15.000Z","lastModified":"2026-06-17T01:58:58.000Z","status":"Modified","sourceIdentifier":"product-security@apple.com","cvss":{"version":"3.0","score":7.8,"severity":"HIGH","vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-20"],"affected":["apple/mac os x"],"epss":{"score":0.00891,"percentile":0.59201,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.89%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://support.apple.com/kb/HT209193","tags":["Vendor Advisory"],"source":"product-security@apple.com"},{"url":"https://support.apple.com/kb/HT209193","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-4423","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."}