“The attack against Samsung smart TVs was developed in cooperation with the United Kingdom’s MI5/BTSS. After infestation, Weeping Angel places the target TV in a ‘Fake-Off’ mode, so that the owner falsely believes the TV is off when it is on. In ‘Fake-Off’ mode the TV operates as a bug, recording conversations in the room and sending them over the Internet to a covert CIA server.” — Vault 7 documents
One of the most disturbing exploits involves making Smart TVs look like they’re turned off, but actually leaving their microphones on. People all around the world are literally bugging their own homes with these TVs.