eSIM Vulnerability in Kigen's eUICC Cards Puts Billions of IoT Devices at Risk

TL;DR

Cybersecurity researchers have identified a significant vulnerability in eSIM tech used in modern smartphones and IoT devices. The flaw affects Kigen’s eUICC cards, potentially exposing billions of devices to cyber threats.

Main Content

Cybersecurity researchers have uncovered a critical vulnerability in the eSIM technology used in contemporary smartphones and IoT devices. This flaw, which affects Kigen’s eUICC cards, exposes users to severe security risks. According to Kigen’s website, over two billion SIMs in IoT devices have been enabled as of December 2020, highlighting the vast potential impact of this vulnerability ¹.

The discovery was made by Security Explorations, a renowned research lab specializing in cybersecurity threats. The vulnerability allows attackers to exploit weaknesses in the eSIM technology, potentially compromising the security of billions of connected devices. This issue underscores the growing concerns about the security of IoT ecosystems and the need for robust protective measures.

Conclusion

The revelation of this eSIM vulnerability serves as a stark reminder of the ongoing challenges in securing IoT devices. As the number of connected devices continues to grow, it is crucial for manufacturers and cybersecurity experts to collaborate in addressing these vulnerabilities. Ensuring the security of eSIM technology is paramount to protecting users and maintaining the integrity of IoT ecosystems.

References

1. The Hacker News (2025). “eSIM Vulnerability in Kigen’s eUICC Cards Exposes Billions of IoT Devices to Malicious Attacks”. The Hacker News. Retrieved 2025-07-14. ↩︎