If you're an Android user, you'd better hope that a stranger doesn't send you a video message in the near future -- it might compromise your phone. Security researchers at Zimperium have discovered an exploit that lets attackers take control if they send a malware-laden MMS video. The kicker is that you may not even need to do anything to trigger the payload, depending on your text messaging app of choice. While the stock Messenger app won't do anything until you see the message, Hangouts' pre-processing for media attachments could put you at risk before you're even aware that there's a message waiting.