Michaels Stores Inc. confirmed Thursday that 2.6 million customer credit and debit cards used at its signature Michaels craft stores and 400,000 cards used at its subsidiary Aaron Brothers were affected by a security breach. Still, the company said it had received “limited” reports of fraud. The breach targeted systems at Michaels stores between May 8 and Jan. 27 and Aaron Brothers stores between June 26 and Feb. 27.
