CVE-2025-48910 is a heap-based buffer overflow vulnerability identified in the DFile module of Huawei's HarmonyOS, specifically affecting versions 4.3.0 and 5.0.0. This vulnerability is classified under CWE-122, which pertains to improper handling of memory buffers leading to overflow conditions on the heap. The flaw allows an attacker with low privileges and remote access (attack vector: adjacent network) to potentially corrupt memory by overflowing a buffer during the processing of data in the DFile module. Successful exploitation can lead to impacts on system availability, such as crashes or denial of service, by overwriting critical memory structures. The CVSS v3.1 base score is 5.5 (medium severity), reflecting limited confidentiality and integrity impact but a notable availability impact. The attack requires low complexity and no user interaction, but does require some level of privileges (PR:L). No known exploits are currently reported in the wild, and no patches have been publicly linked yet. The vulnerability's presence in a core OS module used for file management or related operations makes it a significant concern for device stability and reliability.

For European organizations, the primary impact of CVE-2025-48910 lies in potential service disruption and availability loss on devices running vulnerable versions of HarmonyOS. This could affect enterprises using Huawei devices for mobile communications, IoT deployments, or embedded systems relying on HarmonyOS. Disruptions could impair business continuity, especially in sectors dependent on real-time data processing or critical communications. Although confidentiality and integrity impacts are rated low, the availability impact could lead to denial of service conditions, affecting operational workflows. Additionally, organizations may face increased support and remediation costs and potential reputational damage if service outages occur. Given Huawei's market presence in Europe, particularly in telecommunications and consumer electronics, the vulnerability could have a moderate operational impact if exploited.

1. Immediate mitigation involves upgrading affected HarmonyOS devices to patched versions once available from Huawei. Until patches are released, organizations should restrict network access to vulnerable devices, especially limiting exposure to adjacent networks where exploitation is feasible. 2. Implement network segmentation and strict access controls to minimize the attack surface, ensuring that only authorized and trusted devices can communicate with HarmonyOS endpoints. 3. Monitor device logs and network traffic for anomalous behavior indicative of exploitation attempts, such as unexpected crashes or malformed packet sequences targeting the DFile module. 4. Employ endpoint protection solutions capable of detecting memory corruption attempts or abnormal process terminations. 5. Coordinate with Huawei support channels to obtain timely updates and advisories. 6. For critical deployments, consider temporary device isolation or fallback to alternative platforms until the vulnerability is fully mitigated.