The National Information Technology Development Agency (NITDA) is warning Nigerians to take urgent precautions following the discovery of a critical security flaw affecting embedded Universal Integrated Circuit Card (eUICC) technology, popularly known as eSIM, which powers billions of devices worldwide.
According to the Nigeria tech agency, the vulnerability originates from outdated versions of the GSMA TS.48 Generic Test Profile (6.0 and earlier) used in smartphones, tablets, wearables, and Internet of Things (IoT) devices. If left unpatched, the flaw could allow attackers to compromise user communications at scale.
eSIM flaw: Why this matters to Nigerian users
eSIM technology, unlike traditional SIM cards, is soldered into devices and can be remotely programmed by mobile networks. Its adoption has grown rapidly with 5G rollouts, IoT expansion, and next-generation smartphones now supporting the technology.
Nigeria, Africa’s largest mobile market, is rapidly integrating eSIM technology as part of its digital transformation. With millions of devices already in circulation and more expected under 5G and IoT growth, the impact of a mass exploit could be severe.
For everyday Nigerian consumers, this translates into greater convenience—you no longer need to swap SIM cards when changing operators—but it also means a new set of risks if vulnerabilities remain unpatched.
NITDA explains that attackers with either physical or remote access could exploit the flaw in affected Kigen eUICC implementations to:
- Install malicious applications on the SIM.
- Steal or clone encryption keys.
- Hijack SIM profiles.
- Maintain hidden, long-term access to devices.
Such an attack could enable large-scale interception of calls, messages, and data, with serious implications for both consumers and businesses.
What Nigerian users can do to stay safe
NITDA recommends the following immediate steps for device users:
- Update devices regularly: Ensure that smartphones, tablets, and wearables receive the latest over-the-air (OTA) updates from manufacturers and network providers.
- Check with your mobile network operator: Confirm whether your operator has applied the latest Kigen OS patches and upgraded to GSMA TS.48 version 7.0 to close known vulnerabilities.
- Avoid outdated devices: Users of older smartphones or IoT devices with no update support should consider upgrading to more secure alternatives.
- Stay alert to suspicious activity: Unexpected SIM profile changes, connectivity drops, or abnormal device behaviour may signal compromise.
The GSMA connection
The GSMA (GSM Association), the global trade body for mobile operators, sets the standards governing SIM and eSIM technology worldwide. With over 1,000 operators and manufacturers as members, GSMA frameworks like TS.48 are critical to securing mobile ecosystems.
By advising migration from older TS.48 test profiles to version 7.0, GSMA is mandating stronger safeguards to prevent malicious applets from being embedded into eSIMs.
Why this is critical for Nigeria
Nigeria, Africa’s largest mobile market, is rapidly integrating eSIM technology as part of its digital transformation. With millions of devices already in circulation and more expected under 5G and IoT growth, the impact of a mass exploit could be severe.
As of mid-year, Nigeria’s telecoms market accounted for over 171.7 million phone lines and over 140.6 million internet connections, according to statistics from the telecoms regulator, Nigerian Communications Commission (NCC).
NITDA stresses that compliance with GSMA security standards is not optional but essential to protect users, businesses, and government systems from cyber risks tied to eSIM vulnerabilities.
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