CVE-2026-24923 is a permissions and access control vulnerability (CWE-264) identified in the HDC (Huawei Device Connect) module of Huawei's HarmonyOS, specifically affecting version 6.0.0. The vulnerability arises from improper permission enforcement, allowing an attacker with high privileges and requiring user interaction to potentially compromise the confidentiality, integrity, and availability of services running on the affected system. The CVSS v3.1 score of 6.3 reflects a medium severity, with an attack vector classified as adjacent network (AV:A), high attack complexity (AC:H), requiring high privileges (PR:H) and user interaction (UI:R). The scope is unchanged (S:U), but the impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H). This means that while exploitation is not trivial, a successful attack could lead to significant damage, including unauthorized access to sensitive data and disruption of critical services. No public exploits or patches have been released as of the publication date (February 6, 2026). The vulnerability is particularly concerning for environments where HarmonyOS devices are integrated into enterprise or critical infrastructure systems, as improper permission controls can be leveraged to escalate privileges or bypass security mechanisms. The HDC module, responsible for device connectivity and communication, is a critical component, and its compromise could facilitate lateral movement or data exfiltration within affected networks.

For European organizations, the impact of CVE-2026-24923 could be substantial, especially for those relying on Huawei HarmonyOS devices in telecommunications, IoT deployments, or enterprise environments. The vulnerability's ability to compromise confidentiality, integrity, and availability means sensitive data could be exposed or manipulated, and critical services disrupted. This could lead to operational downtime, data breaches, and loss of customer trust. Given Huawei's significant market presence in Europe, particularly in telecom infrastructure and consumer devices, the risk extends to sectors such as telecommunications providers, government agencies, and industries deploying smart devices or IoT solutions based on HarmonyOS. The requirement for high privileges and user interaction reduces the likelihood of widespread automated exploitation but does not eliminate targeted attacks, especially by advanced threat actors. The absence of known exploits currently provides a window for proactive defense, but the lack of patches necessitates immediate risk management measures.

1. Implement strict privilege management policies to ensure that only trusted users have high-level access to HarmonyOS devices and the HDC module. 2. Monitor user interactions and system logs for unusual activities that could indicate attempts to exploit permission controls. 3. Restrict network access to the HDC module to trusted adjacent networks and segment networks to limit lateral movement. 4. Employ endpoint detection and response (EDR) solutions capable of detecting anomalous behavior related to permission escalations or unauthorized access attempts. 5. Engage with Huawei support channels to obtain and apply security patches promptly once they are released. 6. Conduct regular security audits and penetration testing focused on permission and access control mechanisms within HarmonyOS environments. 7. Educate users about the risks associated with interacting with untrusted prompts or applications that could trigger exploitation. 8. Where feasible, consider alternative platforms or devices with a stronger security posture until patches are available.