The cybersecurity news site said financial industry sources noticed a string of fraud on customer credit cards used at the Trump Hotel Collection. The activity appeared on cards used in the past two to three months at properties including the Trump International Hotel New York, Trump Hotel Waikiki in Honolulu and the Trump International Hotel & Tower in Toronto, sources told the outlet.
"Like virtually every other company these days, we are routinely targeted by cyber terrorists whose only focus is to inflict harm on great American businesses. We are in the midst of a thorough investigation on this matter and are working with the U.S. Secret Service and the FBI to help catch these criminals and prosecute to the full extent of the law. We are committed to safeguarding all guests' personal information and will continue to do so vigilantly," his son Eric told CNBC in a statement.
The report said the breach could affect "multiple" Trump hotels but did not specify exactly how many. It would mark the second breach of the hotel chain in the last year.
The report comes after a string of cyberattacks on the hotel industry. Breaches have hit properties from Hilton, Hyatt and Starwood in the last two years.
— CNBC's Ryan Ruggiero contributed to this report.