Booking.com says hackers accessed customer reservation data in a breach that may have exposed booking details, names, email addresses, phone numbers, addresses, and messages shared with accommodations. PCMag reports: On Sunday, users reported receiving emails from Booking.com, warning them that "unauthorized third parties may have been able to access certain booking information associated with your reservation." The email suggests the hackers have already exploited customer information.

"We recently noticed suspicious activity affecting a number of reservations, and we immediately took action to contain the issue," Booking.com wrote. "Based on the findings of our investigation to date, acc...