The hack, the largest in US history, exposed sensitive information, including names, Social Security numbers, drivers' license numbers and addresses.
Equifax did not immediately respond to CNN Business' request for comment.
Hackers leveraged a security flaw in a tool designed to build web applications to steal customer data. Equifax admitted it was aware of the security flaw a full two months before the company says hackers first accessed its data.
It has said its damages exceeded $350 million.
The data breach prompted the resignation of CEO Richard Smith and investigations by federal regulators, multiple states attorneys general and the company faces a number of civil lawsuits.
Gloss