(Ellen Schmidt/Las Vegas Review-Journal) Resorts International websites sprang to life early Friday, but online hotel reservation systems were still inaccessible after five days of cybersecurity issues believed to be a cyberattack by hackers.Įmployees of MGM, the state’s largest employer, were paid as planned on Friday. MGM Resorts International’s Las Vegas properties are experiencing ongoing turmoil after five days of cybersecurity issues believed to be a cyberattack by hackers. Guests walk through New York New York past a sign about MGM’s “unforeseen difficulties” on Friday, Sept.