If you have an iPhone, iPad, or iPod Touch and you haven't yet updated your system to iOS 10.3.1, you could be exposing your device to cyberattacks. No time to update? Immediately disable your Wi-Fi connection until you can reboot your system at home. If you have a Samsung, you should disable your Wi-Fi until further notice.
In an advisory issued yesterday, Apple said an attack "within range" could allow a hacker to take control of your phone.
You can check to see whether your device is updated by going to Settings > General > Software Update, or manually download the update from iTunes.
"My understanding is that it could affect anyone who is operating their mobile with Wi-Fi on nearby an attacker," iOS security expert Will Strafach told The IBTimes. "This is not a common vulnerability and I believe it is critical to upgrade now that the vulnerability has been mentioned publicly."