On January 9, 2019, Cohen Milstein and co-counsel filed a putative nationwide data breach class action with the U.S. District Court, District of Maryland against Marriott International, Inc. (NASDAQ: MAR) following a massive, long-running data breach at the company, on behalf of behalf of 176 Plaintiffs from all fifty states, the District of Columbia, Puerto Rico, and the Virgin Islands.

This landmark court filing comes on the heels of Marriott’s recent admission that approximately 5.25 million unencrypted passport numbers and 20.3 million encrypted passport numbers were among the sensitive customer records accessed by hackers. By the hotel chain’s own acknowledgement, the breach compromised the personal information of nearly 400 million customers who made reservations at Starwood-branded hotels, which Marriott acquired in 2016, making it one of the largest data breaches in the country’s history.

Case Background

Plaintiffs allege that Starwood, and later Marriott, took more than four years to discover the breach and then failed to notify its customers in a timely manner. Marriott became the world’s largest hotel chain when it acquired Starwood.

Beginning in 2014 and possibly earlier, and continuing through November 2018, hackers exploited vulnerabilities in Starwood’s network to access the guest reservation system and steal customer data. Marriott discovered the breach on September 8, 2018 but failed to publicly disclose it until nearly three months later, on November 30, 2018, when it admitted that there had been unauthorized access to the Starwood guest reservation database. This database contained personal customer information, including names, mailing addresses, phone numbers, email addresses, passport numbers, Starwood Preferred Guest (SPG) account information, date of birth, gender, arrival and departure information, reservation dates, and communication preferences. For some customers, the information also included payment card numbers and payment card expiration dates.

The case name is: Vetter, et al. v. Marriott International, Inc., Case No. 19-cv-00094, U.S. District Court for the District of Maryland, Southern Division.