If you use WhatsApp, you’ll want to update both app and device as soon as possible due to a freshly-discovered exploit. The vulnerability was found in Google Android, Apple iOS, and Microsoft Windows Phone builds of the app.

Unlike many mobile attacks, potential victims aren’t required to install or click on anything—they may not even be aware something malicious has taken place.

This attack came to light after CitizenLab suspected a human rights lawyer was being targeted, and after observing, deduced that they were, but the attacks were blocked by the fixes WhatsApp put in place.