Advanced CIA firmware has been infecting Wi-Fi routers for years | Ars Technica
https://arstechnica.com/security/2017/06/advanced-cia-firmware-turns-home-routers-into-covert-listening-posts/
https://arstechnica.com/security/2017/06/advanced-cia-firmware-turns-home-routers-into-covert-listening-posts/