{"id":"CVE-2004-1464","url":"https://www.cyber-defence.io/tools/cve/CVE-2004-1464","generatedAt":"2026-11-01T00:59:21.272Z","title":"Cisco IOS Denial-of-Service Vulnerability","description":"Cisco IOS 12.2(15) and earlier allows remote attackers to cause a denial of service (refused VTY (virtual terminal) connections), via a crafted TCP connection to the Telnet or reverse Telnet port.","published":"2004-12-31T05:00:00.000Z","lastModified":"2026-06-16T22:07:45.000Z","status":"Analyzed","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-400"],"affected":["cisco/ios"],"epss":{"score":0.0484,"percentile":0.91996,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2023-05-19","dueDate":"2023-06-09","knownRansomwareCampaignUse":"Unknown","notes":"Apply updates per vendor instructions.\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20040827-telnet; https://nvd.nist.gov/vuln/detail/CVE-2004-1464"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 9 June 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"http://secunia.com/advisories/12395/","tags":["Broken Link","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://securitytracker.com/id?1011079","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.cisco.com/warp/public/707/cisco-sa-20040827-telnet.shtml","tags":["Not Applicable","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.kb.cert.org/vuls/id/384230","tags":["Patch","Third Party Advisory","US Government Resource"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/11060","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/17131","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/12395/","tags":["Broken Link","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://securitytracker.com/id?1011079","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.cisco.com/warp/public/707/cisco-sa-20040827-telnet.shtml","tags":["Not Applicable","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.kb.cert.org/vuls/id/384230","tags":["Patch","Third Party Advisory","US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/11060","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/17131","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2004-1464","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2004-1464","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."}