The Texas liquor store chain Spec's recently began notifying an undisclosed number of customers that their personal information may have been exposed following a "criminal attack" on the company's network (h/t

The breach, which affected 34 stores in College Station, Corpus Christi, El Paso and the greater Houston area, began on October 31, 2012, and may have continued through March 20, 2014.

All customers who shopped at any of the affected stores during that time may have been affected.

The information potentially exposed includes names, credit or debit card numbers, expiration dates, and/or card security codes -- or, in the case of customers paying by check, bank account numbers, bank routing numbers, birthdates, and/or driver's license numbers.

"This was a very sophisticated attack by a hacker or hackers who went to great lengths to cover their tracks," Spec's spokeswoman Jenifer Sarver told the Houston Chronicle. "It took professional forensics investigators considerable time to find and understand the problem then make recommendations for Spec's to fully address and fix them."

Sarver told the Chronicle that "an estimated fewer than 550,000" customers and employees are likely affected.

All affected customers are being offered one free year of fraud resolution services from AllClear ID. Customers with questions are advised to contact (855) 731-6017.

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