Certain models of D-Link wireless routers contain an undisclosed factory testing backdoor. Unauthenticated attackers on the local area network can force the device to enable Telnet service by accessing a specific URL and can log in by using the administrator credentials obtained from analyzing the firmware.

Certain models of D-Link wireless routers have a path traversal vulnerability. Unauthenticated attackers on the same local area network can read arbitrary system files by manipulating the URL.

HPE Networking Products, originally branded as Comware 5, Comware 7, H3C, or HP, allow remote attackers to bypass intended access restrictions or cause a denial of service via "Virtual routing and forwarding (VRF) hopping."