CVE-2004-1432: Multiple versions of Cisco ONS 15327, ONS 15454, and ONS 15454 SDH, including 4.6(0) and 4.6(1), 4.5(x), 4....

Security readout for executives and security teams

This flaw affects older Cisco optical networking equipment. A remote attacker could send malformed IP or ICMP traffic that resets a control card, causing a denial of service. The business concern is interruption to network transport management or availability where these platforms remain deployed and reachable. Exposure is most likely in organizations still operating legacy Cisco ONS transport equipment, especially if IP or ICMP traffic can reach device control or management interfaces from untrusted networks. Treat this as a legacy infrastructure availability risk. It is not documented here as actively exploited, but exposed optical transport systems could suffer disruptive resets. Prioritize if these devices support critical circuits or remain reachable beyond trusted management networks. Mitigation focus: Identify any deployed Cisco ONS 15327, 15454, or 15454 SDH systems.; Check Cisco’s advisory for affected releases, fixed software, and official workarounds.; Restrict management and control-plane reachability to trusted administrative networks..

Prepared

Jun 30, 2026, 00:54 UTC (UTC+00:00)

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