OT / ICS Security · IoT / OT Attack

Danfoss refrigeration controllers turn a cyberattack into spoilage

French supermarket chains were hit overnight by a cyberattack that remotely took over Danfoss refrigeration controllers and left chilled and frozen stock defrosted, according to BleepingComputer and Help Net Security. The disruption affected hundreds of stores in France, with reported damage running into tens or hundreds of thousands of euros per site.

The controllers are remotely manageable, so once an attacker reaches them they can change cooling settings into heating settings instead. That means the failure is not just device downtime: by morning, staff can find inventory already spoiled, even if the controller is later recovered or rebooted.

For retailers that run connected cold-chain gear, the exposure sits at the operations layer. If those controllers are reachable from outside the store or through a supplier path, a compromise can become immediate stock loss and store disruption, not a conventional IT incident.

4 sources · 2h ago

Timeline

• Oct 13 Reported by SecurityWeek
• Oct 12 Reported by Help Net Security
• Oct 12 Reported by The Record from Recorded Future

Sources

• Oct 13 SecurityWeek

  Refrigeration Controller Hack Spoils Food Across European Supermarkets

  A cyberattack targeted refrigeration controllers, setting refrigerators and freezers across hundreds of supermarkets to defrost.

  original

• Oct 12 Help Net Security

  Cyberattacks hit European grocers: French supermarket freezers hijacked, Dutch and Belgian stores disrupted - Help Net Security

  In France, several supermarket chains have had their freezers tampered with and chilled/frozen products destroyed following a cyberattack.

  original

• Oct 12 BleepingComputer

  Cyberattack shuts down refrigerators at French supermarkets

  Attackers remotely defrosted refrigerators at multiple French supermarket chains overnight in a cyberattack that reportedly targeted Danfoss refrigeration controllers.

  original

Part of the PlainSec briefing for 2026-10-13

Every edition of this story: Danfoss refrigeration controllers turn a cyberattack into spoilage