The designers made a mistake in setting this type of layout because in order to get the administrative webpage, the client has to connect to the network if it is active. Right!. Yes it is. Once a user activates the wireless connection it gets connected to the same WLAN which has a gateway address of 192.168.0.1 (default for Cradle-point routers). It is hilarious but it is trivial to subvert the stuff to get the password. Now, the hacker is in the network, so we can get possible ARP entry which resolute the IP address to the MAC address (simply ping the gateway) for the router.