Netgear credentials are important whether you are on a wired network or a wireless one for the Netgear EX6120 setup. First, make sure of this. Then, check whether all your access points(APs) are having strong passwords which are in association with respective administrative accounts. But if by mistake your password is known by the neighbor or cybercast. Then, you have to compromise with networks for sure. You need to change the administrative ID as well. Tweak them in one shot by logging on to the portal of Netgear. By entering the mywifiext.net setup in addition to changing the settings of the router.