D-Links with firmware numbers DIR-100, DI-524, DI-524UP, DI-604S, DI-604UP, DI-604+, TM-G5240 were found to contain a backdoor which allowed easy access to any person supplying a certain url to access the router from outside. The security problem also affects Planex routers with firmware numbers BRL-04UR, BRL-04CW.
The problematic routers working across internet can easily be identified with online services like Shodan – therefore if you have any matching router firmware, you should update your router’s firmware as soon as possible to protect your communications. This kind of vulnerability exposes all kinds of activities you do on internet ranging from online banking to instant messaging to outside parties easily.
You can read more about the discovery of the backdoor here.
