Grocery retailers across multiple European countries reported unusual malfunctions in their refrigeration equipment on Monday. In each case, the temperature controls on freezers and refrigerators were altered, allowing food to spoil. The incidents appear linked to cyberattacks, though investigators have not yet confirmed the source or method. **What Happened on Monday** The affected systems operated in Belgium, Sweden, Ireland, the Netherlands, and Estonia. Company statements described the changes as deliberate interference that raised temperatures inside the units. Food in those locations became unusable, forcing stores to discard stock and manage customer shortages in the short term. The incidents struck only a limited number of locations within each chain. Smaller or independently operated stores seemed more exposed than flagship sites connected to central networks. Several retailers noted that the targeted equipment often ran older software versions, a factor that may have left the systems more vulnerable. **Similar Incidents in Recent Weeks** A comparable event struck French supermarkets last month. There, hackers reportedly set temperatures as high as 50 degrees Celsius, or 122 degrees Fahrenheit, across hundreds of stores. The pattern repeated in the latest wave, with attackers again focusing on refrigeration controls rather than broader point-of-sale or inventory systems. Dutch refrigeration supplier Danfoss confirmed that seventeen facilities using its equipment experienced the same type of interference. The company had already seen its systems compromised during the French incidents. Irish chain SuperValu reported thirteen stores hit by a suspected attack on one specific refrigeration model. **Industry Response and Containment** Swedish chains ICA and Coop each confirmed limited impact. ICA described an overnight incident affecting a small number of stores outside its central network. Coop stated that seven of its more than 800 locations were involved and described the situation as contained. Belgian operators Delhaize and Carrefour reported similarly narrow effects. Carrefour noted that fifteen of its seven hundred stores faced issues, mainly with freezers, yet all locations remained open. The companies emphasized that the problems did not extend to other store operations. **Broader Implications for Connected Systems** The repeated targeting of refrigeration units highlights a growing risk for everyday commercial equipment that connects to networks. Outdated software appears to have played a role in several cases, leaving devices open to remote manipulation. Similar incidents earlier this year also affected U.S. military commissaries, suggesting the tactic may be spreading beyond Europe. Retailers are now accelerating planned upgrades to newer, more secure systems. The events serve as a reminder that even routine appliances can become entry points when left unpatched. As more stores adopt connected refrigeration, the need for basic cybersecurity hygiene grows more urgent. ([1])
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