The FBI's announcement refers to one router specifically, the TP-Link TL-WR841N, a Wi-Fi 4 model that was originally released in 2007. The UK's National Cyber Security Centre lists 23 TP-Link models that were targeted, but notes that it is likely not exhaustive. Here is the list of affected devices: TP-Link LTE Wireless N Router MR6400TP-Link Wireless Dual Band Gigabit Router Archer C5TP-Link Wireless Dual Band Gigabit Router Archer C7TP-Link Wireless Dual Band Gigabit Router WDR3600TP-Link Wireless Dual Band Gigabit Router WDR4300TP-Link Wireless Dual Band Router WDR3500TP-Link Wireless Lite