CVE-2025-58308 is a vulnerability identified in Huawei's HarmonyOS, specifically in the call module where an improper security check criterion is implemented, categorized under CWE-358 (Improperly Implemented Security Check for Standard). This flaw allows an attacker with local access to exploit the vulnerability without requiring privileges or user interaction, as indicated by the CVSS vector (AV:L/AC:L/PR:N/UI:N). The vulnerability affects multiple versions of HarmonyOS (5.0.1, 5.1.0, and 6.0.0). The improper security check can cause abnormal behavior in system features, potentially impacting confidentiality, integrity, and availability. Although no known exploits are currently reported in the wild, the vulnerability’s nature suggests that attackers could manipulate the call module to disrupt normal operations or leak sensitive information. The absence of patches at the time of publication increases the risk window. The vulnerability’s high CVSS score (7.3) reflects a significant risk, especially considering the critical role of the call module in device functionality. The improper security check could allow unauthorized access or manipulation of call-related processes, which might lead to denial of service or data leakage. Given Huawei's market presence, especially in telecommunications and IoT devices, this vulnerability could have broad implications if exploited.

For European organizations, the exploitation of CVE-2025-58308 could lead to disruptions in communication services, particularly for entities relying on Huawei HarmonyOS-powered devices in critical infrastructure, telecom, and enterprise environments. Abnormal feature behavior in the call module could cause denial of service conditions or unauthorized data exposure, impacting operational continuity and data confidentiality. This is particularly concerning for sectors such as telecommunications providers, emergency services, and government agencies that depend on reliable and secure communication systems. The vulnerability’s ability to be exploited without user interaction or privileges increases the risk of stealthy attacks that could evade detection. Additionally, the potential impact on device integrity may undermine trust in Huawei devices, complicating supply chain security and compliance with European data protection regulations. The lack of available patches necessitates immediate risk management to prevent exploitation. Overall, the vulnerability poses a tangible threat to the availability and security of communication services within European organizations using affected Huawei devices.

1. Restrict local access to Huawei HarmonyOS devices by enforcing strict physical security controls and limiting administrative access to trusted personnel only. 2. Implement network segmentation to isolate devices running affected versions of HarmonyOS, reducing the attack surface. 3. Deploy continuous monitoring and anomaly detection tools focused on call module behavior to identify abnormal operations early. 4. Establish strict device usage policies, including disabling unnecessary call features or modules where feasible to minimize exposure. 5. Coordinate with Huawei and security vendors for timely updates and patches; prepare for rapid deployment once patches become available. 6. Conduct regular security audits and penetration testing on HarmonyOS devices to detect potential exploitation attempts. 7. Educate IT and security teams about this vulnerability to enhance incident response readiness. 8. Consider alternative devices or OS platforms for critical communication functions if risk tolerance is low until the vulnerability is fully mitigated.