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Findings

CVE-2004-1464

Cisco IOS Denial-of-Service Vulnerability

Published Dec 30, 2004 · updated Jun 16, 2026 · cisco ios

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.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 30, 2004 · Catalog

    Detected

    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.

  2. May 19, 2023 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Jun 9, 2023 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

CISA due date Jun 9, 2023

Affected

  • cpe cisco/iosversion unspecified
  • vendor Cisco IOSversion unspecified

Sources

  • CISA KEVCVE-2004-1464

    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.

    cisa.gov
  • CVE.orgCVE-2004-1464

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2004-1464

    30-day exploitation probability 4.8%

    first.org
  • NIST NVDCVE-2004-1464

    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.

    nvd.nist.gov

References