In January 2023, Oslo-based DNV—a leading global maritime classification society and risk management provider—fell victim to a ransomware attack on January 7, forcing the shutdown of IT servers linked to its ShipManager system. The incident disrupted operations for 70 customers, impacting approximately 1,000 vessels reliant on the system for navigation, safety, and compliance management. DNV initiated daily communications with affected clients, providing updates from ongoing forensic investigations. While the attack caused significant operational disruptions—potentially halting vessel management, logistical coordination, and regulatory compliance—the company did not confirm whether sensitive customer or proprietary data was exfiltrated. The shutdown of critical IT infrastructure posed risks to maritime safety, supply chain continuity, and DNV’s reputation as a trusted industry authority. Recovery efforts focused on restoring systems while mitigating further propagation of the ransomware.