Connected Fridges Hacked to 50°C: Cyberattack Hits Belgium and Sweden 2026

A cyberattack on connected fridges has raised temperatures to 50°C in Belgium and Sweden, following a similar incident in France. The breach highlights the vulnerability of Internet of Things (IoT) devices in commercial refrigeration and the need for stronger security.

What Happened: Connected Fridges Targeted in Cyberattack

Last Sunday night, refrigerators in some large food retail chains in Belgium and Sweden suddenly increased their temperature to around 50°C without any manual intervention. Initial reports suggested a computer glitch, but several media outlets now describe it as a cyberattack.

The incident mirrors a previous event in France where supermarkets suffered significant product losses after hackers accessed Danfoss refrigeration systems using default credentials: the username "admin" and a password based on the day of the week.

Why Connected Fridges Are a Security Risk

Connected devices allow centralized and remote management, which is a huge advantage for businesses with thousands of units scattered across locations. That's why major supermarket chains centralize controls such as refrigeration to maintain product quality and reduce energy costs.

However, when access to these systems is not properly protected, they become low-hanging fruit for attackers. Default passwords, unpatched firmware, and weak authentication are common pitfalls in IoT deployments.

The France Precedent

In France, the breach was traced to Danfoss fridges that used "admin" as the admin username and the day of the week as the password. This predictable credential scheme made it easy for attackers to gain control and manipulate temperatures.

Belgium and Sweden: Similar Pattern

The vector of intrusion in Belgium and Sweden is not yet known, but the pattern is consistent: sudden temperature spikes across multiple stores, suggesting a coordinated remote attack rather than a local malfunction.

Impact on Food Safety and Business

Raising fridge temperatures to 50°C can spoil perishable goods, leading to significant financial losses and potential health risks if affected products reach consumers. Supermarkets must discard compromised items and may face regulatory scrutiny.

Beyond immediate losses, such attacks erode customer trust and highlight the importance of securing operational technology (OT) networks. The background to this story is set out in Cyberattack Disrupts French Supermarket Refrigeration Systems. A related thread runs through Japan's AI Cyberattack Crisis: A Warning for Global Businesses. Earlier coverage in Security risks in the Internet of Things (IoT) shows how the argument developed.

How to Protect Connected Refrigeration Systems

• Change default credentials and enforce strong, unique passwords.
• Implement network segmentation to isolate IoT devices from critical systems.
• Regularly update firmware and patch known vulnerabilities.
• Monitor for unusual temperature fluctuations and access patterns.
• Conduct security audits and penetration testing on OT environments.

Comparison of Recent Incidents

What to Watch Next

Investigations into the Belgium and Sweden incidents are ongoing. Authorities and cybersecurity firms will be looking for indicators of compromise and may issue advisories for IoT device manufacturers and users. A closer look at the same subject appears in What are Voice-Activated IoT Smart Devices? All You Need To Know. Anyone following the wider picture can start with Ideal Refrigerator Temperature: 4°C All Year Round. The same theme surfaces in AI-Powered Cyberattack on Renfe and Adif Exposes 500GB of Client Data, which takes a different angle.

Supermarket chains should review their remote management systems and ensure that access controls are robust. The incidents underscore the need for a security-by-design approach in connected devices. Context on how this played out before sits in AI Cyberattack on UK Healthcare Seen as Inevitable by Minister. A companion piece, First AI Agent Cyberattack in Spain: AEPD Confirms Breach, approaches the same subject from another angle.

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