Hackers Torch Grocery Fridges Overnight

Woman shopping in dairy aisle reading a yogurt container — Photo: eldar nurkovic / Shutterstock

Hackers broke into refrigeration systems at hundreds of French supermarkets and cranked the temperature up to 122 degrees Fahrenheit, spoiling food and sparking fires overnight.

Quick Take

France’s cyber emergency response team confirmed widespread compromises of Danfoss refrigeration-control systems used in supermarkets and cold-storage sites.
Major chains including Les Mousquetaires reported units at about 150 stores hitting 50 degrees Celsius, roughly 122 degrees Fahrenheit, for six hours overnight.
Attackers reportedly changed defrost settings too, stretching a one-hour cycle into eight hours so alarms would not trigger right away.
Prime Minister Sebastien Lecornu ordered France’s National Cybersecurity Agency to investigate, and the Paris prosecutor’s office called it a large-scale attack.
Danfoss says most of the affected equipment was old gear that no longer gets security updates, though no group has claimed responsibility.

A Coordinated Hit On The Nation’s Cold Storage

This was not one broken fridge in one unlucky store. French officials confirmed what they called “numerous compromises” of Danfoss refrigeration-management systems spread across supermarkets, convenience stores, and cold-storage warehouses. Multiple independent supermarket groups got hit at the same time, which points to a shared software weakness rather than one store’s bad luck or a simple power outage.

Les Mousquetaires, one of France’s biggest grocery cooperatives, said refrigeration units at roughly 150 of its stores shot up to 50 degrees Celsius, about 122 degrees Fahrenheit, and stayed that hot for six hours overnight. That is not a gentle drift upward. That is an oven-level swing for equipment built to keep food near freezing, and it happened while workers were home asleep and had no chance to catch it early.

Why The Alarms Never Went Off In Time

The attackers reportedly did more than crank up the heat. Le Monde reported the defrost cycle itself got stretched from a normal one hour to a full eight hours, which delayed the alarms that would normally warn staff something was wrong. That is a telling detail. It suggests whoever did this understood exactly how these systems work and deliberately disabled the safety net built into them, not just flipped a switch and walked away.

Investigators zeroed in on Danfoss AK-SM800 and AK-SC355 controllers as the common thread running through the affected stores. Danfoss confirmed it was aware of incidents in France hitting a limited number of its refrigeration-management systems, and the company said the equipment involved was largely legacy hardware that no longer receives software or security updates. That is the kind of admission that should make every business running decades-old industrial equipment take notice.

Government Response And The Damage Left Behind

Prime Minister Sebastien Lecornu directed France’s National Cybersecurity Agency to dig into the breach, and the Paris prosecutor’s office described the incident as a large-scale cyberattack. That is a serious, official response, not a shrug from local store managers. When a head of government orders the national cyber agency into action, it signals officials see this as a genuine security threat, not a routine equipment glitch.

The fallout was costly and dangerous. Reports describe mass disposal of spoiled food along with fires or fire risk tied to the overheated units. One brief caveat is worth noting: the exact ignition details behind the fires have not been fully laid out in public reporting. Still, the pattern across multiple chains, confirmed by officials and the companies involved, paints a clear picture of coordinated digital sabotage with real-world consequences for French grocery shelves and family budgets.

Hackers cooked 400 French supermarket freezers to 50°C overnight.

They used remote access in outdated Danfoss systems to heat refrigerators across Intermarché, Carrefour and Coopérative U, forcing stores to dump tons of food. Losses hit tens of millions; some sites caught fire.…

— Allegiance Pledger (@burntoast317) October 13, 2026

This incident fits a pattern security experts have warned about for years. Connected industrial equipment, from power grids to steel mills to now supermarket fridges, can be turned into physical weapons once someone gets remote access. The lesson for American businesses and regulators is blunt: aging industrial control systems hooked up to the internet without modern security updates are not just inefficient, they are open doors waiting for someone to walk through.