French supermarket cyberattack: Danfoss fridge controllers forced into defrost, stock spoiled, fires reported
Overnight on October 11-12, 2026, attackers abused the defrost function of internet-exposed Danfoss controllers at hundreds of French supermarkets, pinning setpoints near 50C and stretching cycles to eight hours to delay alarms - spoiling stock and sparking fires.
Attack Type: OT & Industrial Systems, IoT Security
Target: French supermarket chains (Intermarché, Netto, Coopérative U, Carrefour, Monoprix, E.Leclerc) refrigeration systems
Severity:Critical
Actor: Unknown
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