As the healthcare sector continues to grapple with the professionalization of cybercrime, the University of Mississippi Medical Center (UMMC) has become the latest high-profile target in a sprawling ransomware attack. This incident is a reminder of the "identity-first" battlefield and the catastrophic impact of machine-speed exfiltration on clinical operations. The attack, first disclosed on 19 February 2026, has severely disrupted the state's only academic medical center. UMMC leadership, inc