CVE-2004-2637: The NAT implementation in Zonet ZSR1104WE Wireless Router Runtime Code Version 2.41 converts IP addresses o...

Security readout for executives and security teams

This CVE describes a flaw in the NAT behavior of the Zonet ZSR1104WE Wireless Router Runtime Code 2.41. Inbound connections may appear to come from the router itself, which can undermine rules that rely on source IP identity. Business urgency depends on whether this obsolete router and firmware are still in use. Exposure is likely limited to environments still using the Zonet ZSR1104WE router with Runtime Code 2.41, especially where inbound NAT or router-mediated access controls protect internal services. The source bundle lists affected fields as n/a, so confirmation requires asset inventory. Prioritize inventory first. If this device and firmware are absent, no action is needed beyond documentation. If present on a live network path, treat it as a legacy perimeter-control weakness and plan replacement or isolation promptly. Mitigation focus: Identify any Zonet ZSR1104WE routers and firmware versions in inventory.; Check vendor or archived advisory guidance for firmware updates or configuration changes.; Remove inbound exposure that depends on this router for source-based trust..

Prepared

Jun 29, 2026, 16:18 UTC (UTC+00:00)

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