Some Sonos and Bose speakers are being remotely hijacked
 

If you have a Sonos or Bose product connected to your home Wi-Fi system and you've been hearing some strange sounds out of it, the good news is that your speaker isn't haunted. The bad news is that it's possible someone has remotely gained access to...
https://www.engadget.com/2017/12/27/...-to-hijacking/