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What to do if you’re affected by the Marriott data breach
(CNN) -- If you've stayed at a Starwood hotel in recent years, there's a good chance you've been impacted by a massive data breach that potentially exposed the personal data of about 500 million guests. Marriott — which owns Starwood hotels such as the St. Regis and the Westin — on Friday disclosed that the Starwood guest reservation system had been hacked, in a breach dating back to 2014.