CVE-2007-2039: The Network Processing Unit (NPU) in the Cisco Wireless LAN Controller (WLC) before 3.2.171.5, 4.0.x before...

Security readout for executives and security teams

This vulnerability can let an attacker within local wireless range disrupt Cisco Wireless LAN Controller packet forwarding. The business impact is wireless network outage or degraded service, not data theft based on the provided sources. The affected versions are old, but legacy controller environments should still be checked. Exposure is most likely in legacy Cisco WLC deployments still running the affected 3.2, 4.0, or 4.1 software trains. The attacker position described is the local wireless network, so internet-wide exposure is not indicated by the source bundle. Treat this as a legacy infrastructure availability risk. Prioritize if business operations depend on old Cisco WLCs, especially at sites where wireless downtime would disrupt staff, customers, or critical workflows. Mitigation focus: Upgrade affected Cisco WLC software to 3.2.171.5, 4.0.206.0, 4.1.x fixed guidance, or later.; Check Cisco’s original advisory for model-specific upgrade and operational guidance.; Retire unsupported WLC platforms where fixed software is unavailable or no longer maintained..

Prepared

Jun 29, 2026, 06:10 UTC (UTC+00:00)

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