CVE-2004-1464
Cisco IOS Denial-of-Service Vulnerability
Does this matter?
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.
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.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 4.84% probability · 92th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 19 May 2023 · due 9 June 2023
- Weakness
- CWE-400
- Affected
- cisco/ios
- Source
- cve@mitre.org
EPSS 4.8% since 30 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20040827-telnet; https://nvd.nist.gov/vuln/detail/CVE-2004-1464
References
- http://secunia.com/advisories/12395/Broken Link, Vendor Advisory
- http://securitytracker.com/id?1011079Broken Link, Third Party Advisory, VDB Entry
- http://www.cisco.com/warp/public/707/cisco-sa-20040827-telnet.shtmlNot Applicable, Vendor Advisory
- http://www.kb.cert.org/vuls/id/384230Patch, Third Party Advisory, US Government Resource
- http://www.securityfocus.com/bid/11060Broken Link, Third Party Advisory, VDB Entry
- https://exchange.xforce.ibmcloud.com/vulnerabilities/17131Third Party Advisory, VDB Entry
- http://secunia.com/advisories/12395/Broken Link, Vendor Advisory
- http://securitytracker.com/id?1011079Broken Link, Third Party Advisory, VDB Entry
- http://www.cisco.com/warp/public/707/cisco-sa-20040827-telnet.shtmlNot Applicable, Vendor Advisory
- http://www.kb.cert.org/vuls/id/384230Patch, Third Party Advisory, US Government Resource
- http://www.securityfocus.com/bid/11060Broken Link, Third Party Advisory, VDB Entry
- https://exchange.xforce.ibmcloud.com/vulnerabilities/17131Third Party Advisory, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2004-1464US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.