Hackers Heat French Supermarket Fridges in Unprecedented Cyber Attack

Hackers remotely forced the temperature of commercial refrigerators up to 50 degrees Celsius (122 degrees Fahrenheit) overnight on October 12, 2026, triggering fires, ruining food supplies, and striking hundreds of supermarkets across France in a large-scale cyberattack reported by theguardian.com.

French Supermarket Refrigerators Forced To 50 Degrees Celsius

The Paris prosecutor office stated that the unauthorized intrusion specifically targeted connected cooling systems inside several major food retail chains throughout France. According to bbc.com, store managers arriving at work encountered waves of hot air coming from freezers, with some units catching fire and displaying internal temperatures as high as 26.5 degrees Celsius on sales floor screens. French broadcaster BFMTV noted that two supermarkets in the Alsace region alone reported combined losses of 270,000 euros, indicating that nationwide damages will likely reach millions of euros.

Retailers Assess Spoiled Stock Across Hundreds of Stores

Les Mousquetaires reported that roughly 150 of its Intermarché and Netto brand stores were hit, keeping fridges heated for six hours and forcing staff to discard all affected inventory to eliminate sanitary risks, theguardian.com reported. Coopérative U chief executive Dominique Schelcher wrote on X that equipment essential to the French food supply was targeted in an unprecedented act of extreme gravity. Carrefour stated that 80 of its 6,000 supermarkets sustained damage, while Monoprix confirmed that 5 percent of its more than 400 branches were affected. Additional disruptions struck E.Leclerc and Auchan locations across the country, with approximately 500 total stores impacted out of roughly 15,000 nationwide.

Cybersecurity Agencies Investigate Danfoss Software Vulnerability

Prime Minister Sébastien Lecornu instructed France’s national cybersecurity agency, ANSSI, to investigate the breach, according to an official in his office cited by theguardian.com. Investigators traced the intrusion vector to a software vulnerability in remote refrigeration management units supplied by Danish engineering firm Danfoss. Danfoss acknowledged that a limited number of incidents occurred in France, stating that the affected units operated on outdated firmware that could not be updated to prevent the exploit. The company reiterated that clients are routinely advised to keep supported systems updated or migrate legacy hardware to current-generation alternatives.

Cross-Border Network Disruptions Spread to Dutch and Belgian Markets

The security incident extended beyond French borders as Dutch supermarket operator Ahold Delhaize reported an internal network security issue that forced management to take several systems offline. Albert Heijn physical stores in the Netherlands and Belgium remained open, but online smartphone applications, delivery networks, and electronic price tags malfunctioned, yahoo.com reported. Delhaize branches in Belgium and Luxembourg also experienced operational difficulties, while American subsidiaries including Stop & Shop, Giant, Hannaford, and Food Lion displayed temporary outage notices on their websites. French officials confirmed they are coordinating with European counterparts to determine the full scope of the multi-country disruption, though authorities have not yet formally linked the French refrigerator hack to the Ahold Delhaize network problems.

Investigative Probes Continue As Unanswered Questions Remain

European Food Commissioner Christophe Hansen condemned the attack on X, declaring that the weaponization of food has become a reality requiring heightened security across all levels. While ANSSI and French prosecutors pursue active cyber-crime investigations, authorities have not yet identified the individual hackers or criminal groups responsible for executing the remote overrides. It remains unclear whether any additional retail firms or critical infrastructure sectors across Europe will experience secondary attacks, or when full operational stability will be restored to all compromised European store networks.