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Can IoT Devices Survive eUICC Security Vulnerabilities?

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by Tailor Jackson
July 23, 2025
Can IoT Devices Survive eUICC Security Vulnerabilities?
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The world of IoT devices faces significant challenges from eUICC security vulnerabilities, potentially leaving billions of devices exposed. Recent revelations concerning flaws in eSIM profile management have exposed critical weaknesses affecting radio compliance in eSIM-enabled hardware. These vulnerabilities stem from outdated iterations of the GSMA TS.48 Generic Test Profile. Attackers with physical access and knowledge of public keys have the chance to install harmful JavaCard applets on compromised eUICCs. Such breaches can result in unauthorized profile downloads and interception of communications, placing the confidentiality of mobile network operator data in jeopardy. Although successful exploitation requires specific conditions, the potential misuse by threat actors, notably nation-states, is evident, underscoring these vulnerabilities as a pressing concern.

A Path Toward Enhanced Security

Security Explorations uncovered a flaw that led Kigen to award a $30,000 bounty for its responsible disclosure. The vulnerability was linked to versions 6.0 and earlier of the GSMA TS.48 specification, permitting unverified applet installations that risked compromising profile state visibility and could hinder remote eSIM management. In response, Kigen issued a security patch and teamed up with GSMA to revise the test profile specification to TS.48 v7.0, preventing applet installation and bolstering key management. Experts liken this to past Oracle Java Card weaknesses, highlighting that exploiting the flaw requires physical access yet poses significant concerns, stressing vigilance as crucial. The partnership between Kigen and GSMA showcases the tech sector’s dedication to enhancing security for IoT devices and demonstrates proactive approaches to future threats. Through these continuous efforts, IoT security is poised to become increasingly robust, ensuring comprehensive protective measures are in place against emerging vulnerabilities.

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