CVE-2025-12114 is a vulnerability classified under CWE-1191, indicating improper access control on an on-chip debug and test interface within Azure Access Technology's BLU-IC2 and BLU-IC4 products up to version 1.19.5. The core issue arises from an enabled serial console that can potentially leak sensitive information. This leakage does not directly allow remote code execution or privilege escalation but can provide attackers with valuable insights to discover additional vulnerabilities or weaknesses in the system. The vulnerability has a CVSS 4.0 base score of 5.2, reflecting medium severity. The vector metrics indicate that exploitation requires local access (AV:L), high attack complexity (AC:H), no privileges (PR:N), and user interaction (UI:P). The impacts on confidentiality, integrity, and availability are low to limited, but the scope is high, meaning the vulnerability affects components beyond the immediate vulnerable code. The serial console's improper access control means that unauthorized users with physical or local access could potentially extract debug information, which is often sensitive and can reveal internal system states or credentials. No patches or exploits are currently documented, but the presence of this vulnerability necessitates careful control of physical and local access to affected devices. The affected products are specialized hardware components used in Azure Access Technology's ecosystem, which may be embedded in various network or industrial devices.

For European organizations, the primary risk lies in the potential exposure of sensitive debug information through the serial console interface on BLU-IC2 and BLU-IC4 devices. This could facilitate targeted attacks by revealing system internals or configuration details, enabling attackers to craft more effective exploits. Critical infrastructure sectors such as telecommunications, energy, and manufacturing that deploy these devices may face increased risk of reconnaissance and subsequent compromise. Although the vulnerability requires local access and user interaction, insider threats or attackers with physical access could exploit it. The limited direct impact on confidentiality, integrity, and availability reduces the immediate risk of catastrophic failure but does not eliminate the threat of information leakage leading to more severe attacks. Organizations relying on Azure Access Technology hardware should consider this vulnerability in their risk assessments, especially where devices are deployed in less physically secure environments.

1. Restrict physical and local access to devices running BLU-IC2 and BLU-IC4 firmware versions up to 1.19.5 to trusted personnel only. 2. Disable the serial console interface if it is not required for debugging or maintenance operations. 3. Implement strict access control policies and monitoring for any use of debug interfaces. 4. Conduct regular audits of device configurations to ensure debug interfaces are not inadvertently enabled. 5. Work with Azure Access Technology to obtain firmware updates or patches once available, and plan timely deployment. 6. Employ network segmentation and device isolation to limit exposure of vulnerable devices. 7. Train staff to recognize the risks associated with debug interfaces and enforce secure handling procedures. 8. Use hardware security modules or tamper-evident seals to detect unauthorized physical access.