CVE-2004-1464
Cisco IOS Denial-of-Service Vulnerability
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run IOS, fix it now.
CISA required action: Apply updates per vendor instructions.
US federal civilian agencies must remediate by Jun 9, 2023.
Patch status
Official fix available since
Apply the vendor's update to every affected system. Check the fixed-in versions below where known.
Basis: NVD patch reference
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.
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
Affected products
| Product | Vendor | Affected versions | Source |
|---|---|---|---|
| IOS | Cisco | <= 12.2\(15\)zj3 | KEV |
Sources: KEV = CISA Known Exploited Vulnerabilities catalog.
Intelligence timeline
Developments from the last 30 days, newest first.
- CVSS scoredUpdateKEV
CVE-2004-1464 scored CVSS 5.9: Cisco IOS, Cisco IOS Denial-of-Service Vulnerability
CISA lists this as exploited in the wild. Unpatched IOS systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
- Patch releasedUpdateKEV
Patch released for CVE-2004-1464: Cisco IOS, Cisco IOS Denial-of-Service Vulnerability
An official fix is now available for Cisco IOS. This vulnerability is being exploited, so apply it promptly.
Basis: NVD patch reference
1 earlier event is available with a subscription. See plans.
Coverage
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