American Express exposed to third-party breach, BleepingComputer says

American Express warned customers that its credit cards were exposed in a third-party data breach after one of its service providers was hacked, Lawrence Abrams of BleepingComputer reports. In a data breach notification filed with the state of Massachusetts, American Express said the breach occurred at one of its service providers used by their travel services division, American Express Travel Related Services Company, says the website. “Account information of some of our Card Members, including some of your account information, may have been involved. It is important to note that American Express owned or controlled systems were not compromised by this incident, and we are providing this notice to you as a precautionary measure,” the company wrote. It is unclear how many customers were impacted, what service provider was breached, and when the attack occurred, BleepingComputer notes.