Several D-Link routers sold for consumer and commercial use have been found to have a serious security flaw that could provide a backdoor for hackers. The problems centres on a buffer overflow, where the attacker sends a long string of code to the device. This triggers the overflow that would then allow the hacker to execute code or modify the routers firmware, which could, in theory provide access to an entire network. The models affected are DI-524, DI-604, DI-624, DI-784, EBR-2310, WBR-1310 and WBR-2310. Users should visit the D-Link website and download the security patch to protect their systems.