JPMorgan Chase Says 76 Million Households And 7 Million Businesss Affected By Data Breach

The hack was first reported more than a month ago.

Lucas Jackson / Reuters

More than a month after the FBI said it was investigating cyber attacks on U.S. banks, JPMorgan Chase, the country's biggest bank by assets, disclosed that 76 million households and 7 million small businesses have had been compromised.

The bank said that "user contact information" including the name, address, phone number, email address, and "internal JPMorgan Chase information relating to sush users" was affected by the breach. The bank said that there is "no evidence" that the breach allowed anyone to access the account numbers, passwords, user IDS, birhtday, or social security numbers of the accountholders and that there wasn't any "unusual consumer fraud" related to the breach.

JPMorgan Chase has 65.8 million open credit card accounts and 31.8 million with sales activity, according to its most recent quarterly report. Chase also has 30.1 million checking accounts.

The attack was launched in mid-August by Russian hackers, Bloomberg News reported.