Another month, another massive Android vulnerability that puts hundreds of millions of smartphone users at risk. The vulnerability is being called Stagefright 2.0 because of how many devices it encompasses, which security researchers at Zimperium zLabs claim could be more than a billion. More frightening than the number of people affected is the fact that the vulnerability could allow hackers to take control of your device by having you run an MP3 or MP4 video file on your smartphone, and it’s probably not going to get patched for people running older devices.