CVE-2025-58287 is a Use After Free (UAF) vulnerability identified in the office service of Huawei's HarmonyOS versions 5.0.1 and 5.1.0. The root cause is linked to improper permission management (CWE-275), which leads to a scenario where memory is freed but still accessed later, causing undefined behavior. This can be exploited by an attacker with local access and requiring user interaction to execute arbitrary code or leak sensitive information, thus compromising confidentiality, integrity, and availability of the service. The CVSS 3.1 base score is 7.8, reflecting high severity with an attack vector of local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), user interaction required (UI:R), unchanged scope (S:U), and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). Although no public exploits are known yet and no patches have been released, the vulnerability poses a significant risk due to the critical nature of the office service and the potential for privilege escalation or data exfiltration. The vulnerability was reserved on 2025-08-28 and published on 2025-10-11. The lack of patch availability necessitates immediate mitigation through access controls and monitoring until official fixes are deployed.

For European organizations, the exploitation of CVE-2025-58287 could lead to severe consequences including unauthorized access to sensitive documents and data leakage from office service components on HarmonyOS devices. This can result in intellectual property theft, exposure of confidential communications, and disruption of business operations due to service instability or denial of service. Given the high impact on confidentiality, integrity, and availability, organizations relying on Huawei HarmonyOS devices for office productivity or communication are at risk of significant operational and reputational damage. The local attack vector means that insider threats or compromised endpoints could be leveraged to exploit this vulnerability. Additionally, the requirement for user interaction suggests phishing or social engineering tactics could be used to trigger the exploit. The absence of patches increases the window of exposure, emphasizing the need for proactive defense measures. The impact is particularly critical for sectors handling sensitive data such as finance, government, and critical infrastructure within Europe.

1. Immediately restrict physical and local access to HarmonyOS devices running affected versions (5.0.1 and 5.1.0) within the organization to trusted personnel only. 2. Implement strict endpoint security controls including application whitelisting and behavior monitoring to detect anomalous activity related to the office service. 3. Educate users about the risks of social engineering and phishing attacks that could trigger the required user interaction for exploitation. 4. Monitor system logs and network traffic for unusual patterns indicative of exploitation attempts targeting the office service. 5. Disable or limit the use of the vulnerable office service component if feasible until patches are available. 6. Engage with Huawei support channels to obtain updates on patch releases and apply them promptly once available. 7. Consider network segmentation to isolate HarmonyOS devices from critical systems to limit potential lateral movement. 8. Maintain up-to-date backups of critical data to mitigate impact in case of successful exploitation. 9. Conduct regular vulnerability assessments and penetration testing focusing on local privilege escalation vectors. 10. Collaborate with industry information sharing groups to stay informed about emerging exploits or mitigation strategies.