CVE-2025-8907 is a high-severity vulnerability identified in the H3C M2 NAS device, specifically affecting version V100R006. The vulnerability arises from a flaw in the Webserver Configuration component, which allows execution with unnecessary privileges. This means that certain operations or commands can be executed with higher privileges than required, potentially leading to privilege escalation. The attack vector is local access, indicating that an attacker must have local access to the device to exploit this vulnerability. The attack complexity is high, and exploitation is difficult, which reduces the likelihood of widespread exploitation. The vendor notes that the device does not actually implement the boa webserver functionality, and anonymous file access or upload through boa services is impossible, which limits remote exploitation avenues. Additionally, the affected product is no longer supported by the vendor, meaning no official patches or updates are available to remediate this issue. The CVSS 4.0 score is 7.3 (high), reflecting the significant impact on confidentiality, integrity, and availability if exploited, despite the high attack complexity and local attack vector. No known exploits are currently observed in the wild, but public disclosure of the exploit code exists, increasing the risk over time. The vulnerability does not require user interaction or authentication beyond local access, and the scope is limited to the affected device and version.

For European organizations using the H3C M2 NAS V100R006, this vulnerability poses a significant risk. If an attacker gains local access—such as through compromised internal networks, malicious insiders, or physical access—they could execute commands with elevated privileges, potentially leading to unauthorized data access, modification, or disruption of NAS services. This could result in data breaches, loss of data integrity, or denial of service, impacting business continuity and compliance with data protection regulations like GDPR. The lack of vendor support means organizations cannot rely on official patches, increasing the risk exposure. Given the high complexity and local access requirement, the threat is more relevant in environments with weaker internal security controls or where physical security is insufficient. The public availability of exploit code may encourage targeted attacks against vulnerable devices in critical infrastructure, enterprise storage, or data centers within Europe.

Since the affected H3C M2 NAS devices are no longer supported and no patches are available, organizations should prioritize the following mitigations: 1) Immediate inventory and identification of all H3C M2 NAS V100R006 devices in their environment. 2) Isolate these devices on segmented networks with strict access controls to prevent unauthorized local access. 3) Implement strong physical security controls to prevent unauthorized physical access to the devices. 4) Restrict administrative access to trusted personnel only, using multi-factor authentication where possible. 5) Monitor device logs and network traffic for unusual local activity indicative of exploitation attempts. 6) Plan and execute a migration strategy to replace unsupported H3C M2 NAS devices with supported, patched alternatives to eliminate exposure. 7) Employ host-based intrusion detection systems on networks where these devices reside to detect anomalous privilege escalation behaviors. 8) Educate internal staff about the risks of local access exploitation and enforce strict endpoint security policies. These steps go beyond generic advice by focusing on compensating controls and device replacement strategies given the lack of vendor patches.