CVE-2004-1435: 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 CVE describes a denial-of-service condition in older Cisco optical networking platforms. A remote attacker could force a control card reset by abusing TCP connection handling. For executives, the concern is service disruption on legacy transport infrastructure, not data theft. The source bundle does not provide a CVSS score or confirmed active exploitation. Exposure is most likely in organizations still operating legacy Cisco ONS transport equipment with reachable TCP services. Risk increases where device management or control-plane interfaces are accessible from untrusted networks. Current exposure cannot be determined from the source bundle alone. Treat as a targeted infrastructure availability risk. Prioritize validation if legacy Cisco ONS equipment supports production transport services or telecom operations. If no affected devices are deployed, business urgency is low. Mitigation focus: Identify any Cisco ONS 15327, ONS 15454, or ONS 15454 SDH assets in service.; Check Cisco’s advisory and support channels for fixed releases or platform-specific guidance.; Restrict TCP access to ONS management and control interfaces to trusted administration 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.