CVE-2000-0700: Cisco Gigabit Switch Routers (GSR) with Fast Ethernet / Gigabit Ethernet cards, from IOS versions 11.2(15)G...

Security readout for executives and security teams

This issue affects older Cisco Gigabit Switch Routers using Fast Ethernet or Gigabit Ethernet cards. Under line-card failure conditions, traffic controls may fail or an interface may stop forwarding packets, creating access-control bypass or outage risk on affected network paths. Exposure is likely limited to legacy Cisco GSR deployments with the specified Ethernet line cards and IOS trains. Modern environments are exposed only if these devices remain in production, lab, carrier, or unmanaged network segments. Treat as high priority where legacy GSR routers still protect sensitive network boundaries. The business risk is unauthorized traffic passing ACLs or loss of forwarding on important links. Mitigation focus: Inventory Cisco GSR routers and IOS versions against the affected ranges.; Review Cisco’s vendor advisory for supported fixes or workarounds.; Prioritize remediation where affected interfaces enforce security boundaries..

Prepared

Jul 12, 2026, 00:24 UTC (UTC+00:00)

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