Over 350 French supermarkets affected by cyber attack on Danfoss

Danish refrigeration systems provider Danfoss suffered a massive cyberattack targeting connected refrigeration systems that affected over 350 stores across France.

Headquartered in Nordborg, Denmark, Danfoss is an engineering and manufacturing company developing energy-efficient technologies for climate, food, and industrial sectors. In France, it supplies refrigeration systems to supermarkets, helping preserve perishable goods and maintain food safety. I ts clients include Intermarché, Coopérative U, Carrefour Market, Monoprix, E.Leclerc,and Super U.

Recently, French media reported that Danfoss suffered a significant cyber attack in which threat actors compromised internet-connected refrigeration systems and increased refrigerator and freezer temperatures at hundreds of supermarkets across France to as highas 50°C overnight, resulting in food spoilage and fires.

The Chairman and CEO of Coopérative U confirmed that the cyber attack had disrupted refrigeration facilities at several stores within the supermarket network.

Je confirme qu’une cyberattaque touche depuis cette nuit les installations de production de froid de plusieurs magasins de notre réseau @CooperativeU . Nos équipes sont pleinement mobilisées, en lien avec les frigoristes, pour rétablir la situation au plus vite. Une enquête devra… — Dominique Schelcher (@schelcher) October 12, 2026

Je confirme qu’une cyberattaque touche depuis cette nuit les installations de production de froid de plusieurs magasins de notre réseau @CooperativeU . Nos équipes sont pleinement mobilisées, en lien avec les frigoristes, pour rétablir la situation au plus vite. Une enquête devra… — Dominique Schelcher (@schelcher) October 12, 2026

Je confirme qu’une cyberattaque touche depuis cette nuit les installations de production de froid de plusieurs magasins de notre réseau @CooperativeU . Nos équipes sont pleinement mobilisées, en lien avec les frigoristes, pour rétablir la situation au plus vite. Une enquête devra…

An Intermarché spokesperson also confirmed that a cyberattack targeting a service provider responsible for managing in-store refrigeration systems had disrupted operations, leaving some fresh and frozen food display units out of service.

“Intermarché and Netto have taken all necessary precautions to remove the products from these units as quickly as possible. We don’t have further information currently, nor a specific list of affected stores to with you,” the spokesperson said.

French Prime Minister Sébastien Lecornu has directed the National Cybersecurity Agency (ANSSI) to investigate the incident.

Je condamne fermement la cyber attaque visant des produits alimentaires chez @intermarche @CooperativeU @Leclerc La sécurité alimentaire nécessite plus d’attention à tous les niveaux. Car l’instrumentalisation de l'alimentation est devenue une réalité. @UEFrance — Christophe Hansen (@CHansenEU) October 12, 2026

Je condamne fermement la cyber attaque visant des produits alimentaires chez @intermarche @CooperativeU @Leclerc La sécurité alimentaire nécessite plus d’attention à tous les niveaux. Car l’instrumentalisation de l'alimentation est devenue une réalité. @UEFrance — Christophe Hansen (@CHansenEU) October 12, 2026

Je condamne fermement la cyber attaque visant des produits alimentaires chez @intermarche @CooperativeU @Leclerc La sécurité alimentaire nécessite plus d’attention à tous les niveaux. Car l’instrumentalisation de l'alimentation est devenue une réalité. @UEFrance

Agriculture and Food Commissioner Christophe Hansen also strongly condemned the cyber attack affecting food products at Intermarché, Coopérative U, and E.Leclerc supermarkets.

At the time of publishing, no known hacker group claimed responsibility for the cyber attack on Danfoss. The company also did not details on who was behind the attack or whether it had received a ransom demand.

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