← CVE catalog

CVE-2004-1464

Medium CVSS 5.9 Known exploited

Published 2004-12-31 · last changed 2026-06-16 · added to CISA KEV 2023-05-19

This one is being exploited in the wild.

CISA added CVE-2004-1464 to the Known Exploited Vulnerabilities catalog on 2023-05-19. Federal agencies are required to remediate it on a deadline. If you have affected machines, this is the class of finding that moves ahead of the rest of the queue.

The fix

We hold no Microsoft remediation data for CVE-2004-1464, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

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.

Sources

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