Naked Security has a story about the FCC and BadBIOS-like warnings about TVs:
BadBIOS is back
One of the most intriguing – and perhaps the most outlandish – technique for cross-device tracking is mentioned in the public comment submitted to the FTC’s workshop by the DC-based Center for Democracy and Technology (CDT). The CDT makes reference to an Indian company that claims to offer a TV-to-smartphone tracking system that works, if you can believe it, using ultrasound. Just like the BadBIOS controversy from late 2013, which was supposed to be hardware-level malware that could steal data even across a so-called network “air gap,” such as the one that exists between the average TV and smartphone. The idea is that you can use regular audio waves to transmit data between two computers that have no other sort of network connection.
Full article:
Firmware Security 