CVE-2025-6666 identifies a security weakness in the motogadget mo.lock Ignition Lock, specifically in the NFC Handler component, where a hard-coded cryptographic key is used. Hard-coded keys are a critical security anti-pattern because they can be extracted by attackers who gain physical access to the device, enabling them to bypass cryptographic protections. In this case, the vulnerability allows an attacker to manipulate the cryptographic process, potentially enabling unauthorized ignition or control over the lock. The attack requires physical access to the device and has a high complexity level, making exploitation challenging. No user interaction or authentication is needed, but the attack vector is physical, limiting remote exploitation. The vendor has not responded to disclosure requests, and no patches or mitigations have been released. The CVSS 4.0 vector indicates a low severity score of 1.0, reflecting the difficulty of exploitation and limited impact on confidentiality, integrity, and availability. The vulnerability affects version 20251125 of the mo.lock Ignition Lock. Given the nature of the device—used in vehicle ignition systems—this vulnerability could allow attackers to start or manipulate vehicles or equipment without authorization if they can physically access the lock. However, the complexity and physical access requirements reduce the likelihood of widespread exploitation.

For European organizations, particularly those in automotive manufacturing, fleet management, or industries relying on motogadget mo.lock Ignition Locks, this vulnerability poses a risk of unauthorized vehicle or equipment ignition. This could lead to theft, operational disruption, or safety hazards. However, the impact is mitigated by the high complexity of the attack and the need for physical access, limiting the threat mostly to targeted attacks rather than mass exploitation. Organizations with large fleets or high-value vehicles using this product may face increased risk. Additionally, the lack of vendor response and patches means organizations must rely on compensating controls. The confidentiality impact is low since the vulnerability does not expose sensitive data remotely, but integrity and availability could be compromised if attackers manipulate ignition controls. The overall operational risk is moderate but should not be ignored in environments where physical security is less controlled or where vehicles are left unattended in unsecured locations.

1. Enhance physical security controls around vehicles and equipment using the mo.lock Ignition Lock to prevent unauthorized physical access. 2. Implement strict access control policies and surveillance in areas where affected devices are deployed. 3. Monitor for unusual ignition or device behavior that could indicate exploitation attempts. 4. Where possible, replace affected devices with alternative ignition locks that do not use hard-coded cryptographic keys or that have received security updates. 5. Engage with motogadget or authorized distributors to seek firmware updates or security advisories. 6. Educate personnel on the risks of physical tampering and the importance of reporting suspicious activity. 7. Consider additional vehicle immobilization or tracking technologies as compensating controls. 8. Maintain an inventory of affected devices to prioritize risk management and incident response planning.