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Cyberattack on French Supermarkets Compromises Refrigeration Systems

Cyberattack on French Supermarkets Compromises Refrigeration Systems

First seen 13 Oct 2026, 11:30 UTC • •
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ThreatCluster AI
ThreatCluster •October 13, 2026 at 12:30 UTC
  • •Hackers raised supermarket fridge temperatures to 50°C, spoiling food and causing fires.
  • •The attack targeted outdated refrigeration systems from Danfoss, affecting multiple supermarket chains.
  • •French authorities are investigating the incident, which could lead to significant financial losses.

On October 11-12, 2026, hackers targeted refrigeration systems at hundreds of French supermarkets, raising temperatures to 50°C (122°F) and causing food spoilage and fires. The Paris prosecutor's office is investigating the incident, which affected chains like Intermarché and Coopérative U, with damage estimates in the tens of millions of euros. The attack exploited vulnerabilities in outdated refrigeration management systems from Danish supplier Danfoss. Reports indicate that the systems were manipulated to enter extended defrost cycles, compromising food safety. France's National Cybersecurity Agency (ANSSI) is involved in the investigation, emphasizing the need for better cybersecurity practices in food supply chains. The specific method of access used by the attackers has not yet been disclosed.

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Timeline

2026-10-11
Cyberattack on French supermarkets
Hackers manipulated refrigeration systems, raising temperatures and causing food spoilage across hundreds of stores.
TIME
2026-10-12
Investigation launched
The Paris prosecutor's office opened an investigation into the cyberattack affecting multiple supermarket chains.
News9Live
2026-10-13
ANSSI confirms investigation
France's National Cybersecurity Agency confirmed its involvement in investigating the cyberattack's impact on food security.
TIME

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Common questions

Which supermarket chains were affected?
Chains including Intermarché, Coopérative U, Carrefour, and Monoprix reported being targeted.
What vulnerabilities were exploited?
The attack exploited outdated refrigeration management systems from Danfoss, which had known vulnerabilities.
What should supermarkets do now?
Supermarkets should assess their refrigeration systems, ensure they are updated, and review cybersecurity practices to prevent future attacks.