40 million accounts could be compromised...In what could be the largest data security breach to date, MasterCard International on Friday said information on more than 40 million credit cards may have been stolen.
Of those exposed accounts, about 13.9 million are for MasterCard-branded cards, the company said in a statement. Some 20 million Visa-branded cards may have been affected and the remaining accounts were other brands, including American Express and Discover.
MasterCard and Visa both say they have notified their member banks of the specific accounts involved so the banks can take action to protect cardholders.
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