Backdoored Business Routers An Emerging Threat

In a troubling new development, threat actors looking for different ways to break into and remain undetected on enterprise networks appear to have begun targeting routers connecting businesses to the Internet.

Once considered a largely theoretical risk, backdoored business routers could soon pose a big problem for enterprises, security vendor FireEye warned in a report released Tuesday.

FireEye said it has discovered at least 14 instances worldwide where attackers have managed to successfully replace the firmware on Cisco business routers with a malicious implant dubbed SYNful Knock by the security vendor.