Threat Intelligence

Outdated Fridge Firmware Costs EU Supermarkets Millions of Euros

Dark Reading · 23 Oct 2026

Key Takeaway If a supplier manages your refrigeration or other connected equipment, ask them in writing how and how often its firmware is updated, and make sure you know who is accountable if it fails.

Hundreds of supermarkets in the European Union have reportedly suffered losses running into the millions of euros. The cause was outdated firmware, the low-level software that runs operational technology (OT), on systems controlling their refrigeration and climate control.

According to the report, the affected stores had relied on third parties to manage this firmware. The software was not kept up to date, and the businesses paid the price.

The incident is a reminder that equipment such as fridges and cooling controllers runs on software that needs maintenance like any other system. Handing management to an outside provider does not remove the business's responsibility for the risk. The summary available does not give further technical detail, so the precise nature of the failures is not covered here.

Summarised by CISO AI from Dark Reading, written with Claude Sonnet 5.5. We link back to every original so you can read it yourself.