JP Morgan said it discovered a significant data breach affecting over 451,000 retirement plan participants, as disclosed in a regulatory filing to the Office of the Maine Attorney General.
The exposed information includes names, addresses, Social Security numbers, and details regarding payment and deductions. Those who arranged direct deposits were also hard hit as their bank routing and account numbers were compromised.
The breach, which stemmed from a software flaw rather than a cyberattack, involved unauthorized access by three system users linked to J.P. Morgan customers or their agents. The software issue allowed these users to access plan participant data they were not entitled to view, which then got included through reports they ran between August 26, 2021, and February 23, 2024.
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