If you tend to reuse passwords or haven’t changed one in years, you should assume your credentials are vulnerable and take steps to protect yourself.

“This is not just a leak—it’s a blueprint for mass exploitation,” researchers said. “With over 16 billion login records exposed, cybercriminals now have unprecedented access to personal credentials that can be used for account takeover, identity theft, and highly targeted phishing.”

The original source of the report, Cybernews, says that since the start of the year, its researchers have “discovered 30 exposed datasets containing from tens of millions to over 3.5 billion records each.