FORT WAYNE, Ind. (WOWO): If you have a Yahoo account, change your password.

In a statement released online, Yahoo Chief Information Security Officer Bob Lord says a copy of “certain user account information”, including names, email addresses, phone numbers, birth dates, and passwords, was stolen from the company’s network in late 2014 by what they believe is a “state-sponsored actor.”

The company believes at least 500-million user accounts were stolen.

Lord says the company is notifying affected users, taking steps to enhance their systems, and they’re working closely with law enforcement.

Find more details, and what you should do if you’re impacted by this, at this link.