Home Depot may be the latest retailer to have suffered a massive credit card breach, the company confirmed on Tuesday, after Krebs on Security reported that a large cache of stolen data had appeared on black market sites. Home Depot is working with investigators to flesh out the origin of "unusual activity," a spokeswoman told CNBC in a statement. "Protecting our customers' information is something we take extremely seriously, and we are aggressively gathering facts at this point while working to protect customers," she added, but declined to provide further information. Krebs reported that the breach bore hallmarks of the same groups that have hit Target and P.F. Chang's, among other vendors. Krebs says the breach may be extended across all of Home Depot's U.S. stores.
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--- CNBC.com Staff