Marriott security breach exposed data of up to 500M guests

NEW YORK (AP) — Hackers stole information on as many as 500 million guests of the Marriott hotel empire over four years, obtaining credit card and passport numbers and other personal data, the company said Friday as it acknowledged one of the largest security breaches in history.

The full scope of the failure was not immediately clear. Marriott was trying to determine if the records included duplicates, such as a single person staying multiple times.

The affected hotel brands were operated by Starwood before it was acquired by Marriott in 2016. They include W Hotels, St. Regis, Sheraton, Westin, Element, Aloft, The Luxury Collection, Le Méridien and Four Points. Starwood-branded timeshare properties were also affected. None of the Marriott-branded chains were threatened.

The crisis quickly emerged as one of the biggest data breaches on record.

“On a scale of 1 to 10 and up, this is one of those No. 10 size breaches. There have only been a few of them of this scale and scope in the last decade,” said Chris Wysopal, chief technology officer of Veracode, a security company.

By comparison, last year’s Equifax hack affected more than 145 million people. A Target breach in 2013 affected more than 41 million payment card accounts and exposed contact information for more than 60 million customers.