CMA CGM Ransomware Cyber Attack: How Ragnar Locker Paralyzed Global Shipping Operations

CMA CGM, the world’s fourth-largest container shipping company, recently joined the growing list of maritime giants targeted by cybercriminals. Following in the footsteps of Maersk, MSC, and COSCO, CMA CGM suffered a ransomware cyber attack that crippled operations across its global network, affecting thousands of customers and logistics partners.

The CMA CGM Cyber Attack Timeline

In late September, CMA CGM confirmed that its e-commerce and online booking systems were shut down following a ransomware attack attributed to the notorious Ragnar Locker malware. For nearly two weeks, the company’s websites were offline or partially functional, paralyzing container tracking, booking, and delivery operations worldwide.

On October 12th, the French liner announced that its e-commerce sites had resumed operations and that all main functionalities were restored. However, the incident caused significant backlogs across key trade routes, particularly in the U.S. and Europe.

What Is Ragnar Locker Ransomware?

Ragnar Locker is a sophisticated form of ransomware that targets Microsoft Windows-based systems. Once installed, it encrypts critical files and demands payment from victims to restore access. The malware first surfaced in 2019 and has since affected several high-profile organizations, including Portugal’s national electricity company and U.S. travel management firm CWT, which reportedly paid hackers $4.5 million to recover stolen data.

In the case of CMA CGM, early reports suggested that the attack not only encrypted systems but also led to a potential data breach. This raised serious concerns about the exposure of sensitive shipping and customer information.

Industry-Wide Impact of Cyber Attacks

Cybersecurity threats in the maritime industry have been increasing dramatically over the past decade. Major carriers like Maersk, MSC, and COSCO previously suffered similar ransomware attacks that caused global supply chain disruptions.

These incidents reveal how digitization and automation in shipping—though crucial for efficiency—also introduce new vulnerabilities. As container lines and port operators adopt cloud-based systems, they become attractive targets for cybercriminals seeking financial gain and strategic disruption.

How the Attack Affected Global Shipping

The CMA CGM ransomware cyber attack temporarily halted a significant portion of global cargo logistics. Customers were unable to track shipments, confirm container availability, or make new bookings. According to logistics experts, this caused cascading delays across multiple supply chains — from European exporters to American importers.

In the United States, container delivery businesses were among the hardest hit. Many were unable to access depots or verify inventory, leading to postponed deliveries and frustrated customers. Although containers were physically available, CMA CGM’s internal systems couldn’t confirm ownership or release orders, effectively freezing cargo movement.

CMA CGM’s Official Response

After restoring operations, CMA CGM released a statement assuring customers that all communication channels were once again secure:

“All communications to and from the CMA CGM Group are secure, including emails, transmitted files, and electronic data interchanges. All our agencies and back-office operations are now fully functional. The CMA CGM Group thanks its customers and partners for their understanding and support.”

The carrier also emphasized that it has reinforced its cybersecurity defenses and continues to collaborate with international cybersecurity agencies to prevent future incidents.

Cybersecurity Lessons for the Shipping Industry

This event highlights the growing need for cyber resilience in the maritime sector. Ports, carriers, and logistics companies must prioritize digital protection as much as physical security. Best practices include:

• Regularly updating and patching IT systems and software.
• Implementing multi-layered authentication and encryption.
• Conducting employee cybersecurity awareness training.
• Establishing incident response plans to minimize downtime.
• Collaborating with cybersecurity firms and regulators for early detection and prevention.

The Road to Recovery

Following the CMA CGM ransomware cyber attack, the company has been gradually rescheduling deliveries and prioritizing delayed shipments. While operations have resumed, the incident underscores a critical point — cybersecurity is now as essential as port infrastructure in maintaining global trade stability.

For updates on the global shipping industry and security developments, check our related posts on YES Containers Blog or read about how technology is transforming logistics in our article on The Future of Shipping Containers (2025).