Amex cardholder data exposed in merchant processor hack

Card issuer American Express notified cardholders this month that their personal information may have been compromised due to a merchant processor being hacked.
“We became aware that a third-party service provider engaged by numerous merchants experienced unauthorized access to its system,” the company wrote in a template notice to customers filed Feb. 27 with the Massachusetts Office of Consumer Affairs and Business Regulation. “Account information of some of our Card Members, including some of your account information, may have been involved.”
A spokesperson for the New York-based company didn’t respond to questions about the number of Amex cardholders that may have been affected by the hack; what date the hack occurred; when the company became aware of the breach; when it notified customers about it; or what the name of the hacked merchant processor was.