Seventy-six million households and 7 million small businesses were subject to a security hack at JPMorgan Chase & Co. that exposed names, addresses, phone numbers and email addresses.
The breach may have exposed personal information of former account holders and people who entered contact information at the bank's online and mobile sites as well as that of customers.
The company first discovered the data intrusion in July, when it announced that about a million of its customers were affected.
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