After hacking more than 50,000 printers, hackers, known as HackerGiraffe and j3ws3r, compromised more than 5,000 smart TVs operating a Chromecast to promote the PewDiePie YouTube channel. The two attackers exploited a security vulnerability in some routers that makes it possible to make smart devices viewable on Internet by connecting them to the routers via Wi-Fi. This is the Universal Plug and Play (UPnP). It is often turn on by default by some routers or manually by users who are unaware of its end use. The exploitation of this vulnerability allowed the two hackers to post a message directly on their victims’ TVs warning them that their personal data was exposed on the net. “Your Chromecast/Smart TV is exposed to the public Internet and reveals sensitive information about you “, with the mention “You should also subscribe to PewDiePie“. If both hackers are fans of PewDiePie’s videos, they said that this hacking should help raise awareness among owners of smart devices. Google, for its part, declared that it had received many complaints about this. The American firm defended itself by indicating that the problem was due to the adjustment of the Chromecast and not to a breach of security. A press release states: “This is not a problem specific to Chromecast, but rather the result of the router settings that make smart devices, including Chromecast, accessible to the public “.