A Simple WhatsApp Security Flaw Exposed 3.5 Billion Phone Numbers
- Posted on November 18, 2025
- By Wired
- 3 Views
A Simple WhatsApp Security Flaw Exposed 3.5 Billion Phone Numbers
By plugging tens of billions of phone numbers into WhatsApp’s contact discovery tool, researchers found “the most extensive exposure of phone numbers” ever—along with profile photos and more.
