Mysterious Mastercard Merchant Data Breach Triggers Bank Warning As Customers Urged To ‘Pay Close Attention’ To Money Movements

A US bank is warning customers of a security “intrusion” that may have compromised Mastercard account numbers and other financial data.

Massachusetts-based Eagle Bank says it has received a notice from Mastercard, stating an unnamed US merchant allowed unauthorized access to account information between August 15th, 2023, and May 25th, 2024.

The bank revealed the breach in a filing with the Massachusetts state government.

“We have been advised by MasterCard of a security breach of a United States merchant’s network. Your MasterCard Debit card data was among those records that may have been exposed.

The intrusion allowed Mastercard account numbers and account details to be possibly compromised and in the possession of unauthorized individuals…

The event in no way compromised the security in force at Eagle Bank or had any direct impact upon your account records on file at our institution.”

Eagle Bank is encouraging customers to “pay close attention” to their monthly checking account statements over the next 12 to 24 months to look for unauthorized transactions.

The bank is also terminating existing debit cards and issuing new ones.

As of the end of 2023, Eagle Bank held $615 million in total assets.

Update 11/11/24 – The headline has been updated to specify that a Mastercard merchant suffered the data breach.

 

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