A Target in Greenacres FL
A breach of credit and debit card data at discount retailer Target may have affected as many as 40 million shoppers who went to the store in the three weeks after Thanksgiving, the retailer said Thursday.
Late Wednesday, the Secret Service, which is charged with safeguarding the nation's financial infrastructure and payment systems, confirmed it was investigating the breach.
Spokesman Brian Leary declined further comment.
The breach first came to light via a report from respected security
researcher Brian Krebs, who said Target had suffered a data breach around the time of Black Friday last month "potentially involving millions of customer credit and debit card records."
researcher Brian Krebs, who said Target had suffered a data breach around the time of Black Friday last month "potentially involving millions of customer credit and debit card records."
Target (TGT, Fortune 500), the nation's No. 2 general merchandise retailer after Wal-Mart Stores (WMT, Fortune 500), said cards used at the brick-and-mortar stores between Nov. 27 and Dec. 15, 2013, may have been impacted.
Target didn't specify how its systems were hacked. But judging by the scope of the breach and the kind of information criminals got, security experts say hackers targeted the retailer's point-of-sale system. That means they either slipped malware into the terminals where customers swipe their credit cards, or they collected customer data while it was on route from Target to its credit card processors.
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The retailer said it notified authorities and financial institutions immediately after it was made aware of the unauthorized access, and had hired a forensics team to thoroughly investigate how the breach may have happened. The issue that allowed the breach has been identified and resolved, according to Target spokeswoman Molly Snyder.
"Target's first priority is preserving the trust of our guests and we have moved swiftly to address this issue, so guests can shop with confidence," CEO Gregg Steinhafel said in a statement. "We regret any inconvenience this may cause."
The thieves reportedly gained access to data on the magnetic strips of shoppers' cards, potentially allowing them to produce counterfeit versions, according to Krebs.
of shoppers' cards, potentially allowing them to produce counterfeit versions, according to Krebs.
The thieves could also potentially withdraw cash from ATMs using counterfeit debit cards if they were able to intercept PIN data from Target, he said.
Many major credit card companies and banks -- including American Express (AXP,Fortune 500), Discover (DFS, Fortune 500), Bank of America (BAC, Fortune 500),Chase (JPM, Fortune 500), Wells Fargo (WFC, Fortune 500) and PNC -- said they were monitoring the situation, and encouraged customers to alert them to any possible fraudulent charges. In data breach situations, customers aren't on the hook for any fraudulent charges. Someone further up the chain -- the card issuer, or sometimes the merchant -- is responsible for those costs.
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