Neiman Marcus said approximately 1.1 million customer's cards might have been exposed during a recent data breach, according to Reuters

The breach took place from July 16 to October 30, 2013.

"During those months, approximately 1,100,000 customer payment cards could have been potentially visible to the malware," said retailer in a statement. "To date, Visa, MasterCard and Discover have notified us that approximately 2,400 unique customer payment cards used at Neiman Marcus and Last Call stores were subsequently used fraudulently."

At least 2,400 cards used at Neiman Marcus' stores have been affected by the breach according to the company statement.

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Katz said so far birth dates and social security numbers have not been compromised as part of the data breach, according to Reuters.

Katz added that the company's own credit cards have not been affected by the breach as well.

Though the breach is smaller than what Target Corp experienced, the damage to its customers could be more significant considering many Neiman customers have high limits on their credit cards.

Neiman Marcus is offering at one year of free credit identity-theft protection and monitoring for its customers that shopped at the retailer from Jan. 2013 through Jan. 2014.

Target's financial chief is set to testify before the U.S. Senate Judiciary Committee in February regarding a massive data breach that occurred during the 2013 holiday season.

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