It was a busy week in security.

Newly released documents shown exclusively to TechCrunch show that U.S. immigration authorities used a controversial cell phone snooping technology known as a “stingray” hundreds of times in the past three years. Also, if you haven’t updated your Android phone in a while, now would be a good time to check. That’s because a brand-new security vulnerability was found — and patched. The bug, if exploited, could let a malicious app trick a user into thinking they’re using a legitimate app that can be used to steal passwords.

Here’s more from the week.