Hackers Freeze Europe's Supermarkets by Forcing Fridges to Defrost
Hackers activate automatic defrosting accross European supermarket fridges
A cyberattack has crippled supermarket refrigeration across France, Belgium, and the Netherlands, with hackers remotely triggering continuous defrost cycles. The incident disrupted delivery operations and pushed up store prices, marking an unprecedented assault on retail infrastructure. The attack highlights the vulnerability of connected cooling systems in critical supply chains.
An ongoing cyberattack has reportedly struck major supermarket chains across Europe, disrupting refrigeration control systems.
- chromaton
I worked in the field of control systems for supermarkets back in 2008.
These systems are internet connected and remotely controllable because the managers need to be able to see shifts in usage over time and take action to save electricity and provide better food storage. One example might be that due to shifting customer patterns and products, you might want a certain refrigerator case to be kept colder with a narrower temperature range. Another example is for Demand Response: when a brownout may occur, the utility companies want people to lower their load, which, in the case of supermarkets, means turning off lights, increasing the thermostat on the AC, turning off dehumidifiers, etc.
One notable story from that time: this was during the 2008 economic crash, and the company went from hiring to laying off within a week. A group of technicians were working on a refrigerator compressor system and were told by security to stop what they were doing and immediately exit the building. They tried to explain that they were running a special test and needed to shut things down before leaving, but the security guys weren't having it and made them leave right away. The test ended up running overnight, and the managers came in the next morning to over $100,000 worth of damage to the refrigeration equipment.
- vintagedave
This article theorizing US Army freezers were hacked to defrost, from late August this year - only about six weeks ago! - is prescient. It was posted here on HN.
https://signalandsilence.substack.com/p/i-think-someone-hack...
- renyicircle
> Connecting your case controller to the internet offers further opportunities to generate savings. If you can diagnose issues and control the case remotely, service engineers needn’t be called out to simple situations like starting a defrost. And being able to compare performance and efficiency across an entire estate of stores makes it easy to spot patterns and make incremental efficiency gains. (https://www.danfoss.com/en/service-and-support/articles/dcs/...)
I wonder if the incremental efficiency gains from this outweigh the damages. That doesn't even sound like a bad idea, unless of course nobody stops to think "but what if someone hacks this".
- lucasluitjes
Confusing title, both the original and the one here on HN.
Three french supermarket chains had their refrigeration systems hacked.
Separately, a super market chain serving Belgium and the Netherlands shut down a large chunk of their IT systems due to a "cybersecurity incident", primarily affecting distribution centers and grocery delivery services. But the supermarkets are currently open, and do not have refrigeration issues.
Suspicious timing and these incident could well be related, but that has not been reported so far.
It could well be one ransomware attack on Ahold Delhaize, and an unrelated attack on a refrigeration supplier. Note that a similar refrigeration attack happened happened to a number of US military installations a few weeks ago.
- red_admiral
Meanwhile Samsung doesn't even need hackers - a firmware update on consumer devices is enough: https://www.tomshardware.com/service-providers/samsungs-disa...
- yborg
Doesn't look like this needed a rampant AI, pardon, elite superintelligence:
- interloxia
Freeze the Controller, Defrost the Food: Uncovering Vulnerabilities in Danfoss Refrigeration Controllers
Amir Zaltzman
/ August 9th, 2026
https://claroty.com/team82/research/freeze-the-controller-de...
- codedokode
What genius decided to connect a fridge to the Internet? Make him pay the losses.
By the way similar thing might happen to geniuses buying Internet-connected cars.
- MisterMunchkin
Interesting. The government has been suggesting war with Russia is coming. This would be a great initial move. Take out the European food supply network, then hit things like the grid and the internet.
It's funny because red storm rising is an old book at this point, but it's pretty accurately shown exactly how conflict with Russia plays out. Even down to Russia realising it is about to run out of diesel... causing it to invade Europe while it still can.
- paaloeye
It's super bad when even Appie is not safe from those Russians, etc.