Mark Zuckerberg's net worth has plunged about $5 billion after Facebook shares slumped following the Cambridge Analytica scandal in which data of 50 million users was reportedly misused.

The company's stock plummeted nearly 7 percent on Monday putting Facebook on track for their worst day in four years.

Zuckerberg, who is currently the seventh richest person in the world, holds roughly 400 million shares, or 16 percent, in Facebook.

Following the drop, Zuckerberg is now worth an estimated $69.5 billion, according to Forbes.