CVE-2004-1464

Name: CVE-2004-1464
Creator: NVD / NIST
Published: 2004-12-31T05:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10Actively ExploitedEPSS 5.13%

Last modified Jun 16, 2026

CVE-2004-1464 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 5.13% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

5.13%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Jun 9, 2023.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ios	<= 12.2\(15\)zj3

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

Timeline

Published: Dec 31, 2004
Last Modified: Jun 16, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2004-1464?

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.

How severe is CVE-2004-1464?

CVE-2004-1464 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 5.13% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2004-1464?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2004-1464?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST