CVE-2025-58290 identifies a denial of service vulnerability in Huawei's HarmonyOS, specifically within the office service component. The root cause is an improper resolution of path equivalence (CWE-41), which means the system fails to correctly handle different filesystem paths that refer to the same resource. This can be exploited by a local attacker to cause the office service to crash or become unresponsive, thereby affecting system availability. The vulnerability affects HarmonyOS versions 5.0.1 and 5.1.0. According to the CVSS 3.1 vector (3.3 base score), the attack requires local access (AV:L), low attack complexity (AC:L), no privileges (PR:N), but does require user interaction (UI:R). The scope is unchanged (S:U), and the impact is limited to availability (A:L) without affecting confidentiality or integrity. No known public exploits exist yet, and no patches have been published at the time of disclosure. The vulnerability is classified under CWE-41, which relates to improper handling of path equivalence leading to security issues. This vulnerability could be triggered by tricking a user into opening or interacting with crafted files or paths within the office service, causing denial of service conditions. Given the local and user interaction requirements, the attack surface is limited but still relevant for environments where HarmonyOS devices are used for productivity tasks.

The primary impact of CVE-2025-58290 is denial of service, which affects the availability of the office service on HarmonyOS devices. For European organizations, this could disrupt productivity if critical office applications become unresponsive or crash. Although the vulnerability does not compromise confidentiality or integrity, service outages can lead to operational delays, reduced employee efficiency, and potential loss of business continuity in environments heavily reliant on HarmonyOS devices. The requirement for local access and user interaction reduces the risk of widespread remote exploitation but does not eliminate insider threats or targeted attacks. Organizations with Huawei device deployments in sectors such as government, telecommunications, and enterprise environments may face increased risk. The absence of known exploits and patches means organizations should proactively monitor and prepare for remediation to avoid potential future exploitation.

To mitigate CVE-2025-58290, European organizations should implement the following specific measures: 1) Restrict local access to HarmonyOS devices by enforcing strong physical security controls and limiting user permissions to trusted personnel only. 2) Educate users about the risks of interacting with untrusted files or links within the office service to reduce the likelihood of triggering the vulnerability. 3) Monitor Huawei's security advisories closely and apply patches or updates promptly once they become available. 4) Employ endpoint protection solutions capable of detecting anomalous application crashes or denial of service conditions related to the office service. 5) Implement network segmentation to isolate critical HarmonyOS devices from less trusted networks, minimizing the impact of potential local attacks. 6) Conduct regular security assessments and penetration testing focusing on local privilege escalation and denial of service vectors within HarmonyOS environments. These targeted actions go beyond generic advice by focusing on access control, user awareness, and proactive patch management tailored to the specific vulnerability context.