Danfoss added that it had “long advised customers to keep supported systems updated with the latest firmware and to migrate legacy systems to current-generation solutions”.
France was also liaising with European partners amid concerns the attack could extend beyond its borders, with authorities evaluating whether additional French businesses might be vulnerable.
Cybersecurity analyst Felix Aime of Sekoia Threat Detection and Research said the disruption had spread beyond France, with Spain, Portugal, Poland, Germany and Belgium also affected.
Supermarket refrigeration systems are typically managed through internet-connected control panels that cover an entire store’s cold aisles, enabling remote maintenance, but also creating a potential entry point for attackers.
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