
How Cybercriminals Shut Down Refrigerators at 350 French Supermarkets
In October 2026, threat actors executed a coordinated cyberattack against French supermarket chains including Intermarché, Coopérative U, Carrefour Market, and Leclerc, affecting 250-350 stores. The attackers exploited vulnerabilities in Danfoss refrigeration controllers to remotely trigger defrosting systems, raising temperatures to 50 degrees Celsius and causing massive food spoilage and financial losses. The attack leveraged known CVEs (CVE-2025-41450 and CVE-2025-41451) in older Danfoss AK-SM 800A series controllers that were publicly accessible via the internet. This incident represents an alarming evolution in critical infrastructure attacks, demonstrating how operational technology vulnerabilities can cause immediate physical and economic damage. With over 4,500 similar Danfoss devices exposed online globally, this attack highlights the urgent need for better OT security practices and network segmentation in critical supply chain infrastructure.
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