# The French Fridge Hack: What If the Damage Wasn’t Even Intentional?

Related to the recent mass hacking of supermarket refrigeration systems in France, let me tell you a story.

We were once hired by a small print shop where customers uploaded their files to a VPS. Unfortunately, the VPS had most likely been hacked, and they had no access to their customers’ files. This could have resulted in serious financial losses if they couldn’t resume printing the next morning.

Basically, the box had been hacked and `/bin` had been erased. But let’s go back to the beginning of our investigation.

We received the login credentials for the VPS provider and logged into the control panel. I was using my then-new Lenovo laptop, which had an insanely bad touchpad.

I went into the VPS provider’s control panel, which was in Hungarian, and tried to power on the VPS. But the mouse pointer accidentally slipped into a submenu, and I ended up clicking on a completely different option, one that appeared to mean “Reinstall the machine” in Hungarian.

I started taking deep breaths, trying not to panic. The interface hadn’t asked for confirmation, hadn’t shown an “Are you sure?” prompt, nothing. It had simply gone ahead — or so I thought — wiping the machine, reinstalling a fresh Linux system, and deleting all the valuable files they had been storing there for ages.

I felt absolutely terrible. It was completely unintentional. I was literally shaking, thinking I had just made a catastrophic mistake.

Seconds later, I discovered that the button I had accidentally clicked was actually just a reset button. No reinstallation, no wiping, nothing like that — just a hard reset of the machine.

Nothing bad had happened. The machine was already broken and unable to boot anyway, so there was no additional damage, no data loss, nothing.

The menu item’s label was misleading, partly because of a poor translation and partly because of how easily its meaning could be misunderstood. So, at least on that front, everything was fine.

Now, let me add another story.

A lone hacker once managed to break into the IT infrastructure of a major telecommunications company. He poked around, did this and that, and even sent messages to the defenders after realizing they were onto him.

Later on, there was a debate: he hadn’t caused any major damage, so why punish him so harshly?

Now, think back to my story above.

The problem is that user interfaces can be terrible, and internal procedures can be confusing or downright incomprehensible, even to qualified personnel.

A lone hacker might click on a seemingly innocent link, without realizing that this single action could trigger a chain reaction — perhaps knocking out police communications for half an hour or causing some other serious disruption.

This is why I’ve always tried to convince my students to conduct security testing only in an ethical way. That means being explicitly invited or authorized to perform the assessment, understanding the environment and the potential consequences, and having proper points of contact in case something goes seriously wrong — whether you realize what you’ve done or not.

If you do this without permission, you’re not just taking a gamble with your own luck. You may be putting people’s health, livelihoods, or even lives at risk.

Now consider the recent attacks on supermarket refrigeration systems in France.

In October 2026, hundreds of French supermarkets were affected by a cyberattack involving refrigeration controllers, including systems supplied by Danfoss. Attackers reportedly manipulated defrost and temperature settings, causing refrigerators and freezers to heat up and forcing stores to throw away large quantities of food.

According to reports, many of the affected systems were running outdated software with known security vulnerabilities.

References:

– Le Monde, October 13, 2026: https://www.lemonde.fr/en/economy/article/2026/10/13/a-disastrous-day-for-french-supermarkets-after-massive-cyberattack-targets-refrigeration-systems_6758535_19.html
– BleepingComputer, October 12, 2026: https://www.bleepingcomputer.com/news/security/cyberattack-shuts-down-refrigerators-at-french-supermarkets/

Now, just imagine something.

What if the attacker wasn’t some sophisticated, state-backed cyberwarfare unit? What if it was just a lone hacker, perhaps someone from another country, who didn’t even fully understand the interface they were looking at?

Maybe they saw a menu item labeled “Permanent Defrost”, or something similar, possibly in a language they didn’t fully understand.

Maybe they just wanted to prove they could actually do something. Something real.

Perhaps they assumed that defrosting was just a harmless ten-minute procedure. They clicked the button, saw that something happened, felt satisfied, and went off to a party without giving it another thought.

Who knows?

I’m not claiming that’s what happened. We simply don’t know.

And that’s exactly my point.

We don’t know who the attackers are, what country they come from, whether they’re state-backed or not, what their goals are, what capabilities they have, what tools they use, what’s in their arsenal, or how they behave.

But let’s be clear about one more thing:

**We don’t even know whether they actually intended to cause the damage in the first place.**

And to be honest, that somehow makes the whole thing even more frightening…