Stayed at a Hyatt? Check Your Credit Card Statement

Hyatt Hotels Corp. says it found malicious software on the computer system that processes customer payments, raising the possibility that hackers may have obtained credit card numbers or other sensitive information. The resort chain is advising customers to review their credit card statements, although it has not said if any customer data was stolen. Hyatt rep Stephanie Sheppard says the malware was discovered Nov. 30, but she didn't say why the company waited three weeks to report the discovery on Wednesday. "The investigation is ongoing, and we'll have more information once it is complete," she says.

Hyatt also says it has hired outside experts to help investigate the malware, and has taken steps to increase security on its computer systems. Hyatt is the latest of several major hotel chains to report this year that hackers had attacked their computers. The Hilton, Starwood, Mandarin Oriental, and Trump Collection chains have previously acknowledged finding malware in their payment systems. While some of the companies have not disclosed details, Starwood acknowledged last month that the malware enabled "unauthorized parties to access payment card data" for some of its customers. (Hyatt recently banned porn.)