JPMorgan Chase says it has discovered a data breach that compromised the personal information of nearly half a million customers.
New filings with the Office of the Maine Attorney General reveal that the banking giant recently discovered a software glitch that has been active since August 26, 2021.
The bug allowed unauthorized access to 451,809 customers’ retirement plan data, which included names, addresses, Social Security numbers and bank account numbers.
JPMorgan says it has now resolved the issue, which incorrectly granted full access to several “authorized system users” employed by JPMorgan clients or their agents.
The bank says it has no indications that the personal information has been misused and is offering affected customers two years of free credit monitoring through Experian.
This isn’t the first time JPMorgan Chase has discovered a crack in its security infrastructure.
In 2014, the bank reported one of the largest data breaches in history in the form of a cyber attack that affected the accounts of 76 million households and seven million small businesses.
As the New York Times reported, JPMorgan’s security team had failed to add two-factor authentication to one of its network servers, leading to the theft of customers’ email addresses, home addresses and phone numbers. The bank said there is no evidence that account information was leaked during the hack.
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