Google Project Zero security researcher Natalie Silvanovich has published a report showing a vulnerability in WhatsApp that could have allowed an attacker to take control of a video call remotely.
The technical details can be found in Natalie’s blog or a summary here.
The quick summary for this blog is this: Hacker only need your phone number to hijack your WhatsApp account and spy on your conversations.
The good news? This was found and reported in August, and the patch was released on September 28 for Android and Oct 3 for iPhone.