The router in question is a DLink version, the DSL-2740R. The defect was found by a Bulgarian security researcher in the firmware, ZynOS of the router, but did not alarm either the firmware or the router/modem business. Rather, he released the advice without giving an opportunity to provide a fix to the firm.

Let us recap on modem and router basics. Keep in mind that your modem as well as your router perform different functions. However, the DLink version that is affected is outside of your personal computer firewall and other protection and is a mix of modem and router this ZynOS firmware defect is a serious issue. And it is likewise possible that the D-Link model DSL-2740R is not the only one changed, since other router/modem versions use ZynOS firmware.