CVE-2004-0308: Unknown vulnerability in Cisco ONS 15327 before 4.1(3), ONS 15454 before 4.6(1), ONS 15454 SD before 4.1(3)...

Security readout for executives and security teams

This issue affects older Cisco ONS optical networking platforms. A superuser account that should be locked, disabled, or suspended may still gain access through Telnet to the VxWorks shell. For organizations still running these systems, the concern is unauthorized privileged access to infrastructure that may support network transport operations. Exposure is most likely in legacy Cisco ONS deployments with affected software versions and reachable Telnet management access. The source bundle does not identify broader product families, cloud services, or non-Cisco affected products. Prioritize remediation if these legacy Cisco ONS systems remain in production or support critical transport services. The operational risk is privileged access to network infrastructure, but urgency depends on whether Telnet management is exposed and whether affected versions remain deployed. Mitigation focus: Identify Cisco ONS 15327, 15454, 15454 SDH, and 15600 assets.; Upgrade affected systems to Cisco-fixed releases or later per the vendor advisory.; Disable Telnet management where operationally feasible..

Prepared

Jun 30, 2026, 06:41 UTC (UTC+00:00)

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