Attackers Heat French Supermarket Fridges Up to 50°C by Hijacking Danfoss Controllers
Oct 13, 2026
Cyber Attack / Network Security
Attackers took remote control of fridges and freezers at hundreds of French supermarkets on the night of October 11 and warmed them, forcing stores to throw food away, several retail chains said. The attackers reached them through the controller that runs all of a store's fridges and freezers, a device made by Danish company Danfoss that maintenance firms can manage remotely. Les Mousquetaires, which owns the Intermarché chain, said its fridges and freezers were put into defrost and heated to as much as 50°C. CERT-FR, the French government's computer emergency response team, said in an alert published in French on October 12 that it is aware of numerous compromises affecting two Danfoss controller series, the AK-SM and the AK-SC. It told operators to disconnect the controllers or filter access to them. CERT-FR is part of ANSSI, France's national cybersecurity agency. ANSSI's head, Vincent Strubel, called it urgent to take the two series off the internet or fil...