{"id":"CVE-2006-4403","url":"https://www.cyber-defence.io/tools/cve/CVE-2006-4403","generatedAt":"2026-10-27T20:41:10.794Z","title":"The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when a login failure occurs with a valid user name, which allows remote attackers to cause a denial of service (crash) and enumerate valid usernames.","description":"The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when a login failure occurs with a valid user name, which allows remote attackers to cause a denial of service (crash) and enumerate valid usernames.","published":"2006-11-30T16:28:00.000Z","lastModified":"2026-06-16T22:29:02.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":4,"severity":"MEDIUM","vector":"AV:N/AC:H/Au:N/C:P/I:N/A:P"},"cwe":[],"affected":["apple/mac os x"],"epss":{"score":0.03607,"percentile":0.89397,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (3.61%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://docs.info.apple.com/article.html?artnum=304829","source":"cve@mitre.org"},{"url":"http://lists.apple.com/archives/security-announce/2006/Nov/msg00001.html","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/23155","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://securitytracker.com/id?1017303","source":"cve@mitre.org"},{"url":"http://www.kb.cert.org/vuls/id/371648","tags":["US Government Resource"],"source":"cve@mitre.org"},{"url":"http://www.osvdb.org/30734","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/21335","source":"cve@mitre.org"},{"url":"http://www.us-cert.gov/cas/techalerts/TA06-333A.html","tags":["US Government Resource"],"source":"cve@mitre.org"},{"url":"http://www.vupen.com/english/advisories/2006/4750","source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/30621","source":"cve@mitre.org"},{"url":"http://docs.info.apple.com/article.html?artnum=304829","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.apple.com/archives/security-announce/2006/Nov/msg00001.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/23155","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://securitytracker.com/id?1017303","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.kb.cert.org/vuls/id/371648","tags":["US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.osvdb.org/30734","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/21335","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.us-cert.gov/cas/techalerts/TA06-333A.html","tags":["US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vupen.com/english/advisories/2006/4750","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/30621","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2006-4403","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."}