CVE Watch—

CVE-2004-1464

Cisco IOS Denial-of-Service Vulnerability

CVSS

—

No CVSS

EPSS

4.8%

p92

KEV

YES

May 19, 2023

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

4.8%EPSS · 30 days4.8%

2026-09-162026-10-14

KEV catalog record

Product

Cisco / IOS

Vulnerability

Cisco IOS Denial-of-Service Vulnerability

Added to KEV

May 19, 2023

Remediate by

Jun 9, 2023

Known ransomware use

Summary description

Cisco IOS contains an unspecified vulnerability that may block further telnet, reverse telnet, Remote Shell (RSH), Secure Shell (SSH), and in some cases, Hypertext Transport Protocol (HTTP) access to the Cisco device.

Required action

Apply updates per vendor instructions.

Notes

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20040827-telnet; https://nvd.nist.gov/vuln/detail/CVE-2004-1464

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