Approximately 40 million credit and debit card accounts used by Target customers may have been impacted by a major data breach, the retailer said Thursday.
Customer names and credit or debit card numbers are involved in the breach—along with the expiration date and three-digit CVV security code of each card, the store said.
Shoppers who made purchases at their stores between Nov. 27 and Dec. 15 were urged to check their debit and credit card accounts and report suspected unauthorized activity to the firm.
Target said in a statement that it was "aware of unauthorized access to payment card data that may have impacted certain guests making credit and debit card purchases" during the height of the Thanksgiving and Christmas holiday shopping period.
It is one of the largest ever breaches of consumer information, echoing the 2007 theft of data from at least 45.7 million credit and debit cards of shoppers at retailers including T.J. Maxx and Marshalls.