CVE-2005-2841: Buffer overflow in Firewall Authentication Proxy for FTP and/or Telnet Sessions for Cisco IOS 12.2ZH and 12...

Security readout for executives and security teams

This issue affects Cisco IOS Firewall Authentication Proxy handling for FTP or Telnet sessions. A remote attacker could send crafted authentication credentials that crash the device and may allow arbitrary code execution. For executives, the concern is disruption or compromise of network infrastructure if legacy IOS systems still expose this feature. Exposure is likely limited to legacy Cisco IOS deployments running the named trains and using Firewall Authentication Proxy for FTP or Telnet sessions. The source bundle does not identify specific CPEs or current product support status. Prioritize review if the organization still operates legacy Cisco IOS network devices. The business risk is outage of perimeter or routing infrastructure, with possible compromise implied but not fully proven by the bundle. Mitigation focus: Review the Cisco advisory for fixed IOS releases and supported mitigations.; Inventory routers and firewalls for the affected IOS trains.; Identify whether Firewall Authentication Proxy is used for FTP or Telnet sessions..

Prepared

Jun 29, 2026, 17:57 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.