CVE-2025-58291 is a path traversal vulnerability classified under CWE-29, affecting Huawei HarmonyOS versions 5.0.1 and 5.1.0, specifically within the office service component. The vulnerability allows an attacker to use path traversal sequences like '\..\filename' to manipulate file paths improperly. This can lead to denial of service (DoS) conditions by causing the office service to malfunction or crash, thereby affecting system availability. The CVSS 3.1 base score is 3.3, reflecting low severity due to the requirement for local access (AV:L), low attack complexity (AC:L), no privileges required (PR:N), but user interaction is necessary (UI:R). The scope remains unchanged (S:U), and only availability is impacted (A:L), with no confidentiality or integrity loss. No known exploits are currently reported in the wild, and no patches have been released yet. The vulnerability's root cause is insufficient validation or sanitization of file path inputs, enabling traversal sequences to disrupt normal file handling. This vulnerability primarily threatens the availability of the office service on affected HarmonyOS devices, potentially causing service interruptions or crashes when exploited.

For European organizations, the primary impact of CVE-2025-58291 is the potential denial of service on Huawei HarmonyOS devices running the affected versions. This could disrupt business operations relying on the office service, particularly in environments where HarmonyOS devices are integrated into workflows or critical communication. Although the vulnerability does not compromise data confidentiality or integrity, availability interruptions can lead to productivity losses and operational delays. Organizations with Huawei device deployments in sectors such as telecommunications, manufacturing, or government may face increased risk. The low severity and requirement for local access and user interaction limit the attack surface, but insider threats or compromised endpoints could exploit this vulnerability. The absence of known exploits reduces immediate risk, but the lack of patches necessitates proactive mitigation to avoid potential exploitation as threat actors develop attack methods.

1. Restrict local access to HarmonyOS devices, ensuring only trusted users can interact with the office service. 2. Implement strict endpoint security controls to prevent unauthorized local access or execution of malicious inputs. 3. Monitor logs and file system activity for unusual path traversal patterns, especially sequences containing '\..\' or similar traversal indicators. 4. Educate users about the risks of interacting with untrusted files or inputs that could trigger the vulnerability. 5. Coordinate with Huawei for timely patch deployment once available; maintain close vendor communication for updates. 6. Employ application whitelisting or sandboxing for the office service to limit the impact of potential exploitation. 7. Conduct regular vulnerability assessments on HarmonyOS devices to detect and remediate potential exploitation attempts. 8. Consider network segmentation to isolate critical HarmonyOS devices from broader enterprise networks to contain potential DoS impacts.