Hotels Hyatt finishes probe into breach of card data By Danny King / January 15, 2016 Share 1 -- Hyatt Hotels Corp. said Thursday that it has completed an investigation into a breach of its payment-processing system that occurred last year.The investigation identified signs of unauthorized access to data from cards used at Hyatt-managed locations, primarily at restaurants. Hyatt said that "a small percentage" of the at-risk cards were used at spas, golf shops, parking, front desks and sales offices. Most of the at-risk cards were used between Aug. 13 and Dec. 8, but the at-risk window for a limited number of locations began on or shortly after July 30, Hyatt said.Malware in Hyatt's payment-processing system was designed to collect the cardholder's name, card number, expiration date and internal verification code, Hyatt said.Hyatt composed a list of affected Hyatt locations and at-risk dates. About 100 full-service hotels in the U.S. were affected. The company said it is mailing and emailing customers whose name was captured by malware."We worked quickly with leading third-party cybersecurity experts to resolve the issue and strengthen the security of our systems in order to help prevent this from happening in the future," Hyatt said.Both Hilton Worldwide and Starwood Hotels & Resorts last year reported data breaches involving payment-card information.