CVE DATABASE / CVE-2004-1464
CVE-2004-1464
Cisco IOS Denial-of-Service Vulnerability
CVSS 5.9 · MEDIUM
⚠ CISA KEV — ACTIVELY EXPLOITED
On the CISA KEV catalog
Confirmed exploited in the wild. Added 2023-05-19.
Federal remediation due 2023-06-09.
Required action: Apply updates per vendor instructions.
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.
CVSS 3.1 breakdown
| Base score | 5.9 (MEDIUM) |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity | NONE |
| Availability | HIGH |
Weakness type (CWE)
Affected products
Cisco ios
Check this CVE live
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References
- 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
Data: NIST NVD + CISA KEV. NVD last modified 2026-04-16. Always verify against the vendor advisory before acting.