The high-severity RCE flaw is in the KCodes NetUSB kernel module, used by popular routers from Netgear, TP-Link, DLink, Western Digital, et al. It enables remote devices to connect to routers over IP and access any USB devices that are plugged into them. This is made possible using the proprietary NetUSB protocol and a Linux kernel driver that launches a server, which makes USB devices available via the network. For remote users, its as if the USB devices are physically plugged into their local systems.”]
Source: https://threatpost.com/millions-routers-exposed-bug-usb-module-kcodes-netusb/177506/