Cyberattack Targets Refrigeration Systems at French Supermarkets

A cyberattack targeting refrigeration systems at French supermarkets has disrupted store operations, damaged food supplies and raised concerns about the security of essential retail infrastructure. The attack reportedly occurred overnight from October 11 to October 12, 2026, affecting hundreds of supermarkets across France. The incident involved refrigeration controls that manage temperatures in refrigerators and freezers, which are essential for preserving perishable food. Affected retailers reportedly included Intermarché, Netto and Coopérative U, with other major supermarket chains also experiencing disruptions. The full extent of the damage remains under investigation.

Refrigeration Systems Disrupted

Supermarket refrigeration systems protect products such as meat, seafood, dairy products and frozen foods from unsafe temperatures. When these systems stop functioning properly, retailers can face significant inventory losses and potential food safety risks. Reports indicated that some refrigeration units were forced into defrost cycles, causing temperatures to rise. Some units reportedly reached approximately 50 degrees Celsius, or 122 degrees Fahrenheit, creating serious concerns about the condition of stored food. Retailers affected by the incident faced the prospect of discarding products that could no longer be considered safe for sale. The disruption also created potential financial losses from spoiled inventory, equipment repairs and interruptions to normal business operations.

Outdated Software Under Investigation

Investigators are examining refrigeration management systems associated with Danish manufacturer Danfoss. The company acknowledged incidents involving refrigeration control systems in France and indicated that the affected equipment was running outdated firmware. Outdated software can leave connected equipment vulnerable to security weaknesses, particularly when systems remain accessible through remote connections. However, investigators have not publicly established every detail of how the attackers gained access to the refrigeration systems. The incident highlights the growing cybersecurity risks facing businesses that depend on connected equipment. While these systems help retailers monitor temperatures and manage energy use, unauthorized access can interfere with essential operations.

French Authorities Investigate

French authorities have launched an investigation into the cyberattack and its consequences. Investigators are examining the reported damage, food losses and other incidents associated with the disruption while working to determine who was responsible. The attack has raised broader questions about the protection of critical business infrastructure. Supermarkets rely on digital systems for inventory management, payment processing, refrigeration and supply chain operations. A disruption affecting even one of these systems can have consequences beyond a store’s computer network. For retailers, the incident serves as a warning about the importance of maintaining updated software, securing remote access and regularly reviewing the security of connected equipment. As businesses increasingly rely on digital technology to manage physical operations, cybersecurity is becoming essential to protecting inventory, preventing financial losses and maintaining the systems that keep food safe for consumers.