Recent research conducted by the University of Birmingham in collaboration with the security firm Fuzzware has unveiled a significant security vulnerability in cellular IoT devices. The study demonstrates that a malicious SIM card can interact with the device's modem to execute arbitrary commands, effectively granting attackers control over devices such as electric vehicle chargers, industrial routers, and car telematics units. Out of 26 tested devices, this exploit was confirmed, raising alarms about the potential for widespread exploitation in various sectors relying on cellular connectivity.
For businesses, this research underscores the urgent need to reassess the security protocols surrounding their IoT deployments, particularly those utilizing cellular networks. Implementing stricter controls on SIM card provisioning and device authentication could mitigate such risks. As the reliance on IoT devices grows, the implications for cybersecurity are profound; vulnerabilities like this not only threaten individual devices but can also lead to larger network compromises. This situation highlights the necessity for robust cybersecurity measures and continuous monitoring in the evolving landscape of IoT and AI technologies.
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*Originally reported by [The Hacker News](https://thehackernews.com/2026/08/a-malicious-sim-card-can-run-attacker.html)*