Cheap Android TV boxes have quietly become one of the most dangerous devices on the home network, not because of what you watch on them but because of what they might be doing in the background.

Researchers still don’t know the cause of a recently discovered malware infection affecting almost 1.3 million streaming devices running an open source version of Android in almost 200 countries.

Some users are unable to open the Google Play Store on their Android TV and Google TV devices. The Play Store returns a “Can’t connect” error despite the device ...