The break-in occurred at a property belonging to a Wyndham franchisee, but that computer was linked to other company systems. That intrusion enabled a hacker to use the company server to search for customer information located at other franchised and managed property sites.
The hackers were able to get guest names, credit card numbers and expiration dates as well as data from the card’s magnetic stripe. That magnetic stripe information, sometimes called a card verification value (CVV) code, is critical if the thieves want to make fake credit cards.
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Source: www.networkworld.com