CVE-2025-58310 is a permission control vulnerability identified in Huawei's HarmonyOS distributed component, classified under CWE-843 (Access of Resource Using Incompatible Type, or type confusion). This flaw arises when the system incorrectly handles resource types, allowing unauthorized access to resources by exploiting type mismatches. The vulnerability affects HarmonyOS versions 5.0.1, 5.1.0, and 6.0.0. It requires local access (AV:L) but no privileges (PR:N) or user interaction (UI:N) to exploit, making it relatively easier for an attacker with local system access to leverage. The impact is severe, with a CVSS v3.1 base score of 8.0, reflecting high confidentiality impact (C:H), low integrity impact (I:L), and high availability impact (A:H). Exploiting this vulnerability could allow attackers to bypass permission controls in the distributed component, potentially exposing sensitive service data and disrupting service availability. Although no exploits are currently known in the wild, the vulnerability’s nature and impact make it a significant risk. The distributed component is critical in HarmonyOS for inter-device communication and resource sharing, so exploitation could affect multiple services or devices connected within a distributed environment. The vulnerability was reserved in August 2025 and published in November 2025, with no patches currently available, indicating a window of exposure for affected users.

For European organizations, the exploitation of CVE-2025-58310 could lead to unauthorized access to confidential service data within distributed HarmonyOS environments. This is particularly concerning for sectors relying on Huawei devices or infrastructure for critical communications or IoT deployments, such as telecommunications, manufacturing, and smart city applications. The confidentiality breach could expose sensitive business or personal data, while the availability impact could disrupt essential services relying on distributed components. Given the local access requirement, the threat is higher in environments where attackers can gain physical or local network access, such as corporate offices or shared facilities. The partial integrity impact suggests some data manipulation may be possible, potentially undermining trust in system outputs. The lack of known exploits currently reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once patches are released or vulnerabilities become public knowledge. European organizations using HarmonyOS devices should consider this vulnerability a critical risk to their distributed service confidentiality and availability.

1. Immediate mitigation involves restricting local access to devices running affected HarmonyOS versions, including enforcing strict physical security and network segmentation to limit attacker proximity. 2. Monitor system logs and distributed component activities for unusual access patterns or permission anomalies that could indicate exploitation attempts. 3. Huawei should prioritize releasing security patches addressing the type confusion flaw in the distributed component; organizations must apply these patches promptly upon availability. 4. Employ application whitelisting and integrity verification mechanisms to detect unauthorized modifications or access attempts within the distributed environment. 5. Conduct regular security audits and penetration testing focused on local access vectors to identify potential exploitation pathways. 6. Educate users and administrators about the risks of local access vulnerabilities and enforce policies minimizing unnecessary local device access. 7. Consider deploying endpoint detection and response (EDR) solutions capable of identifying suspicious behavior related to permission control bypasses. 8. For critical deployments, evaluate the use of alternative platforms or additional security layers until patches are available.