CVE-2025-58300 is a stack-based buffer overflow vulnerability identified in Huawei's HarmonyOS device management module, affecting versions 5.0.1 and 5.1.0. The vulnerability arises from improper bounds checking in the handling of input data within the device management component, which can lead to overwriting the stack memory. This can cause the system to crash or reboot, thereby impacting availability. The CVSS 3.1 score of 6.2 reflects a medium severity, with an attack vector classified as local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The scope is unchanged (S:U), and the impact is limited to availability (A:H), with no confidentiality or integrity impact. No known exploits have been reported in the wild, and no official patches have been released at the time of publication. The vulnerability primarily threatens devices running HarmonyOS in environments where local access to the device is possible, such as through physical access or compromised local networks. Exploitation could disrupt device operation, leading to denial of service conditions. Given Huawei's significant presence in telecommunications and IoT devices, this vulnerability could have broader implications if exploited in critical infrastructure or enterprise environments.

For European organizations, the primary impact of CVE-2025-58300 is on system availability. Enterprises and service providers using Huawei HarmonyOS devices, particularly in telecommunications, IoT deployments, and device management systems, may experience service interruptions if the vulnerability is exploited. This could lead to downtime in critical infrastructure, affecting business continuity and operational reliability. Although the vulnerability does not compromise data confidentiality or integrity, denial of service conditions can disrupt services, potentially affecting end-users and dependent systems. The requirement for local access limits remote exploitation risks but does not eliminate threats from insider attacks or attackers who gain physical or network proximity. The impact is more pronounced in sectors relying heavily on Huawei hardware and software, including telecom operators, smart city deployments, and industrial IoT applications across Europe.

1. Restrict physical and local network access to devices running affected HarmonyOS versions to trusted personnel only. 2. Implement strict access controls and monitoring on device management interfaces to detect unusual activity indicative of exploitation attempts. 3. Employ network segmentation to isolate critical Huawei devices from less secure network zones. 4. Prepare incident response plans to quickly identify and recover from potential denial of service events caused by this vulnerability. 5. Monitor Huawei security advisories closely for the release of patches or updates addressing this vulnerability and apply them promptly once available. 6. Consider deploying host-based intrusion detection systems (HIDS) or endpoint protection solutions capable of detecting anomalous behavior related to buffer overflow exploitation. 7. Conduct regular security audits and vulnerability assessments on Huawei devices within the environment to identify and remediate potential exposure.