The nation’s largest home improvement chain had disclosed the massive, months-long breach of 56 million debit and credit cards in September.
Home Depot’s breach surpassed Target’s pre-Christmas 2013 data theft, which compromised 40 million credit and debit cards and hurt sales and profits. Since late last year, Michaels, SuperValu and Neiman Marcus have been among a string of retailers that have also reported breaches, though they were smaller.
While shoppers appear to have grown numb to the hacks, the breaches have forcing changes in retailing. Target’s breach pushed banks, retailers and card companies to increase security by speeding the adoption of microchips in U.S. credit and debit cards, which supporters say are more secure. Home Depot reiterated Thursday that it will be activating chip-enabled checkout terminals at all of its U.S. stores by the end of the year.
The file containing the email addresses did not contain passwords or other sensitive personal information, according to Home Depot. However, it said that customers should be on guard against phishing scams. Phishing attacks are sent through texts or emails and try to trap you into disclosing personal information.
The company is notifying affected customers in the U.S. and Canada.
Home Depot also explained how the hackers got into its system. It said that the hackers initially accessed its network in April with a third-party vendor’s username and password. Home Depot said hackers stole information through malware installed on self-checkout systems in the U.S. and Canada. That’s similar to what happened at Target where thieves hacked into the password of a third-party supplier.
Home Depot said that its investigation with law enforcement and efforts to further enhance its security measures are ongoing.
On Thursday it confirmed its sales growth estimate for the year and said it still expects annual profit of $4.54 per share. But unclear is how much Home Depot’s future profits will be affected.
Home Depot’s outlook for its fiscal 2014 year includes estimates for the cost to investigate the data breach, providing credit monitoring services to its customers, increasing call center staffing and paying for legal and professional services. However, it doesn’t include any potential losses related to the breach.
Home Depot is expected to announce fiscal third-quarter results on Nov. 18.
“It’s scary. The numbers are too big to comprehend,” said John Kindervag, vice president and principal analyst at Forrester Research. “But what are you going to do about it?” He noted that Home Depot is lucky that there are only a few big players in the home improvement arena and so there aren’t a lot of other choices to shop.
The company’s stock rose 5 cents to $97.34 in extended trading Thursday. Shares have gained 18 percent in 2014.
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