CVE-2025-54617 is a stack-based buffer overflow vulnerability identified in the dms_fwk module of Huawei's HarmonyOS version 5.1.0. This vulnerability is classified under CWE-121, indicating improper handling of buffer boundaries on the stack, which can lead to memory corruption. Specifically, the flaw allows an attacker with limited privileges (PR:L) and network access (AV:A) to execute code remotely (RCE) without requiring user interaction (UI:N). The CVSS 3.1 base score is 6.8, reflecting a medium severity level. The vector details indicate that the attack complexity is low (AC:L), and the scope is unchanged (S:U), meaning the vulnerability affects the same security scope. The impact on confidentiality is low (C:L), but integrity is high (I:H), and availability impact is low (A:L). Successful exploitation could allow an attacker to execute arbitrary code with the privileges of the affected process, potentially leading to unauthorized control or manipulation of the device. No known exploits are currently reported in the wild, and no patches have been published yet. The vulnerability affects HarmonyOS 5.1.0, which is Huawei's proprietary operating system primarily deployed on IoT devices, smartphones, and other smart devices. The dms_fwk module likely relates to device management services, which could be critical for system operation and device communication.

For European organizations, the impact of this vulnerability depends on the extent of HarmonyOS device deployment within their infrastructure. Enterprises using Huawei devices running HarmonyOS 5.1.0, especially in IoT environments, smart manufacturing, or telecommunications, could face risks of remote code execution leading to unauthorized access, data manipulation, or service disruption. The medium severity rating suggests that while the vulnerability is exploitable with low complexity, the confidentiality impact is limited, but integrity compromise could be significant. This could affect operational technology environments and critical infrastructure relying on Huawei smart devices. Additionally, the lack of patches increases the window of exposure. Given the geopolitical sensitivities around Huawei products in Europe, organizations may also face regulatory scrutiny or compliance challenges if vulnerabilities are exploited. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits over time.

1. Immediate inventory and identification of all Huawei devices running HarmonyOS 5.1.0 within the organization, focusing on those utilizing the dms_fwk module. 2. Implement network segmentation to isolate vulnerable devices from critical network segments, reducing the attack surface. 3. Apply strict access controls and monitoring on network paths that can reach these devices, including limiting remote access and enforcing least privilege principles. 4. Monitor network traffic and device logs for anomalous behavior indicative of exploitation attempts, such as unexpected code execution or unusual communications. 5. Engage with Huawei support channels to obtain patches or workarounds as soon as they become available, and prioritize timely deployment. 6. Consider deploying host-based intrusion detection systems (HIDS) or endpoint detection and response (EDR) solutions capable of detecting exploitation attempts on HarmonyOS devices. 7. For critical environments, evaluate the feasibility of temporarily disabling or replacing vulnerable devices until patches are available. 8. Maintain up-to-date threat intelligence feeds to stay informed about any emerging exploits targeting this vulnerability.