While the company admits that the issue continues to affect some of its systems, it says the vast majority of its property offerings remain operational and it is ready to welcome guests, according to a statement on its website. MGM Resorts identified a cybersecurity issue and began an investigation with experts and law enforcement. 10 rendered several resort services inoperable and compromised private guest information. Vancouverites who recently travelled to Las Vegas may want to check their credit card statement.Ī massive cyber attack in the City of Sin that started on Sunday, Sept.