Why Supermarket Fridges Are Online, and How Hackers Are Exploiting Them
When you walk into a supermarket, you probably do not think about the fridges. You think about milk, cheese, or frozen pizza. But behind the scenes, many of these cooling systems are connected to the internet. That connection saves money and helps staff. It also opens a door for hackers.
Recent cyberattacks on supermarket refrigeration systems in Belgium and France have made this risk very real. Around 40 Delhaize supermarkets and several other stores lost food worth about €100,000. The cause was not a broken compressor or a power cut. It was a digital attack on the systems that manage the fridges.
Why Fridges Need an Internet Connection
Modern refrigeration systems are not simple machines. They are controlled by small computers that monitor temperature, humidity, and energy use. These controllers send data to the cloud. That lets a central team watch hundreds of stores at once.
This setup has clear benefits. If a freezer starts to warm up, an alert can go out before food spoils. Energy use can be tuned to save power. Maintenance can be planned before a part fails. In short, connectivity helps stores cut costs and reduce waste.
The Hidden Risk of Remote Access
The same remote access that helps staff also helps attackers. If a fridge controller can be reached from the internet, so can anyone who finds it. Researchers recently found nearly 13,000 vulnerable refrigeration management services accessible online across various countries. That is a very large number of open doors.
Many of these systems run on outdated software. Some still use default passwords. Others have no strong login checks at all. These weak points make it easy for someone to log in without permission.
What Hackers Can Do
Once inside, an attacker can change temperature settings. They can switch off alarms. They can lock out the real staff. In the recent incidents, food was lost because cooling systems were disrupted. The damage was measured in money, but the risk could be worse. Spoiled food can reach shelves if the problem is not caught in time.
There is also a wider danger. A fridge network is connected to a store network. A weak fridge system can become a stepping stone into other business systems. That is why security experts treat these devices as part of the company’s overall security, not as isolated machines.
Why This Keeps Happening
Cooling equipment is built to last for many years. Software security often does not last that long. A system installed in 2015 may still work fine, but its security may be years out of date. Updating it can be costly and disruptive. So updates get delayed, and the gap grows.
Another problem is visibility. Large chains may have thousands of devices across many sites. It is hard to keep track of every one. Attackers only need to find one weak device.
What Stores and Investors Should Watch
For supermarkets, the lesson is simple. Every connected device needs a strong password, regular updates, and limited access. Networks should be separated so a fridge problem cannot spread. Monitoring should flag strange logins and sudden temperature changes.
For investors, this is a reminder that cyber risk is now operational risk. A digital attack can cause real losses in food, energy, and reputation. Companies that manage connected equipment well are better protected. Those that ignore it may face surprises on the balance sheet.
The internet has made supermarket fridges smarter. The recent attacks show that smart devices must also be secure. Otherwise, the cost of convenience can end up in the bin.
