Cyberattacks crank French supermarket refrigeration systems up to 50°C

Cyberattacks on supermarket refrigeration systems reportedly pushed temperatures as high as 50°C (122°F), affecting hundreds of stores in France and forcing retailers to discard food. Major supermarkets such as Carrefour, Coopérative U, Intermarché, Monoprix, and more were hit by the attacks, which spoiled perishable food and left stores without fresh produce. The affected equipment includes cold-storage units used to hold food before it reaches supermarket shelves. The criminals behind the attack raised temperatures to unsafe levels, spoiling food and in some cases starting fires. Some affected retailers used refrigeration controllers produced by Danish company Danfoss. Authorities have not identified the entry point or confirmed exploitation of the vulnerabilities previously disclosed by Claroty and patched in August 2025, although the manufacturer said affected stores were running outdated firmware. Experts say the previously identified vulnerabilities were easily scriptable and relied on a unique but predictable authentication method. …