CVE-2004-1464: Technical Deep-Dive (Auto Refreshed)

Generated on 2026-03-21T14:22:48.186Z. This file is automatically regenerated every 30 minutes by the CVE AI enrichment job using web sources (NVD, MITRE, CISA KEV, GitHub).

Executive Technical Summary

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.

• Context preserved from previous revision: 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. 1. Use only isolated environments and assets you own or are explicitly authorized to test.

Technical Details

• CVE: CVE-2004-1464
• KEV date added: 2023-05-19
• KEV due date: 2023-06-09
• NVD published: 2004-12-31
• NVD modified: 2025-10-22
• MITRE modified: 2025-10-22
• CVSS base score: 5.9
• CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
• CVSS exploitability score: 2.2
• CVSS impact score: 3.6
• Attack vector: Network
• Attack complexity: High
• Privileges required: None
• User interaction: None
• Scope: Unchanged
• Confidentiality impact: None
• Integrity impact: None
• Availability impact: High

Versions and Products Impacted

• cisco / ios (versions: <= 12.2(15)zj3)
• n/a / n/a (versions: n/a)

Weakness Classification

• NVD-CWE-noinfo
• CWE-400

Repositories for Lab Validation (Public Examples)

• Mr-xn/Penetration_Testing_POC | stars: 7274 | updated: 2026-03-21 | https://github.com/Mr-xn/Penetration_Testing_POC
  Notes: 渗透测试有关的POC、EXP、脚本、提权、小工具等---About penetration-testing python-script poc getshell csrf xss cms php-getshell domainmod-xss csrf-webshell cobub-razor cve rce sql sql-poc poc-exp bypass oa-getshell cve-cms
• Ostorlab/KEV | stars: 607 | updated: 2026-03-16 | https://github.com/Ostorlab/KEV
  Notes: Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
• kpast0/EH-PENTEST-EeBOOK | stars: 0 | updated: 2024-11-25 | https://github.com/kpast0/EH-PENTEST-EeBOOK

People and Organizations Mentioned

• mitre
• Cisco
• IOS
• Mr-xn
• Ostorlab
• kpast0

Practical Defensive Validation (Authorized Only)

1. Use only isolated environments and systems you own or are explicitly authorized to test.
2. Snapshot infrastructure before validation and preserve baseline logs (EDR, SIEM, OS, app).
3. Inventory cisco / ios (versions: <= 12.2(15)zj3) assets and confirm exact vulnerable versions with automated checks.
4. Patch in staged environments and validate closure with scanners + service health checks.
5. Map detections to MITRE ATT&CK tactics relevant to your environment and tune alert quality.

References

• NVD record: https://nvd.nist.gov/vuln/detail/CVE-2004-1464
• MITRE CVE record: https://www.cve.org/CVERecord?id=CVE-2004-1464
• CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• CISA KEV JSON feed: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
• KEV notes: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20040827-telnet; https://nvd.nist.gov/vuln/detail/CVE-2004-1464
• http://secunia.com/advisories/12395/
• http://securitytracker.com/id?1011079
• http://www.cisco.com/warp/public/707/cisco-sa-20040827-telnet.shtml
• http://www.kb.cert.org/vuls/id/384230
• http://www.securityfocus.com/bid/11060
• https://exchange.xforce.ibmcloud.com/vulnerabilities/17131
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2004-1464
• Repository example: https://github.com/Mr-xn/Penetration_Testing_POC
• Repository example: https://github.com/Ostorlab/KEV
• Repository example: https://github.com/kpast0/EH-PENTEST-EeBOOK

This content is for defensive security training and authorized validation only.