A massive France supermarket cyberattack pushed refrigeration temperatures to 50°C, triggering fires, widespread food spoilage and major financial losses across hundreds of stores.
PARIS: A massive France supermarket cyberattack has disrupted hundreds of stores after hackers remotely raised refrigeration temperatures to as high as 50°C, causing fires, destroying food stocks and leaving retailers facing substantial financial losses.
The attack, reported on October 12, 2026, targeted connected refrigeration systems used by major French supermarket chains, including Carrefour, Intermarché, Coopérative U, E.Leclerc and Monoprix.
How did hackers turn supermarket fridges into heaters?
Investigators believe attackers exploited vulnerabilities in internet-connected refrigeration control systems, allowing them to manipulate temperatures remotely.
The hackers reportedly activated continuous defrosting cycles, causing temperatures inside refrigerators and freezers to rise dramatically.
Some systems reached 50°C, far above safe food storage temperatures, damaging fresh and frozen products.
The France supermarket cyberattack also reportedly caused fires at several locations, according to the Paris prosecutor’s office.
Which French supermarkets were affected?
The disruption affected several major retail chains across France.
At least 300 Intermarché and Netto stores were targeted, alongside more than 100 Coopérative U outlets.
Carrefour confirmed that 80 supermarkets were affected, while Monoprix reported disruptions at approximately 5% of its stores.
E.Leclerc also confirmed that several locations had been targeted.
How much food and money were lost?
Retailers were forced to discard large quantities of refrigerated and frozen food after storage temperatures became unsafe.
Intermarché chief executive Thierry Cotillard warned that nationwide losses could reach tens of millions of euros in a single day.
However, the total financial damage has not yet been independently established.
Some affected supermarkets have started restoring operations, while others have faced temporary disruptions as technicians inspect their refrigeration systems.
What caused the security breach?
French authorities identified a possible vulnerability involving refrigeration software supplied by Danish engineering company Danfoss.
The manufacturer confirmed that affected equipment was running outdated firmware and emphasised the importance of software updates.
French cybersecurity authorities are examining the incident and assessing whether similar vulnerabilities could threaten other businesses.
The investigation is also considering reports of disruption in other European countries.
Impact to expect
The France supermarket cyberattack could prompt supermarkets across Europe to strengthen cybersecurity, update refrigeration software and review emergency food storage procedures. Retailers may also face increased insurance costs and operational expenses as concerns grow over the security of connected equipment.
The incident highlights how cyberattacks can disrupt essential services, threaten food supplies and cause real-world physical damage.
