CVE-2025-14015 is a buffer overflow vulnerability identified in the H3C Magic B0 device, specifically affecting versions up to 100R002. The vulnerability resides in the EditWlanMacList function within the /goform/aspForm endpoint, where improper handling of input parameters allows an attacker to overflow a buffer. This flaw can be triggered remotely over the network without requiring authentication or user interaction, making it highly exploitable. The buffer overflow can lead to arbitrary code execution, potentially allowing attackers to gain control over the affected device, disrupt network operations, or exfiltrate sensitive data. The vulnerability was disclosed publicly on December 4, 2025, with a CVSS 4.0 base score of 8.7, indicating a high severity level. The vendor, H3C, has not responded or provided patches, and a public exploit is available, increasing the urgency for mitigation. The vulnerability impacts the confidentiality, integrity, and availability of the device and connected networks, posing a significant risk to organizations relying on H3C Magic B0 for wireless networking. Given the device’s role in network infrastructure, exploitation could lead to widespread disruption and compromise of sensitive communications.

For European organizations, exploitation of CVE-2025-14015 could result in severe consequences including unauthorized remote control of network devices, disruption of wireless network services, and potential data breaches. The buffer overflow could be leveraged to execute arbitrary code, enabling attackers to install persistent malware, intercept or manipulate network traffic, and disrupt critical business operations. Organizations in sectors such as telecommunications, government, finance, and critical infrastructure that deploy H3C Magic B0 devices are particularly vulnerable. The lack of vendor response and patch availability increases the risk of successful attacks, especially given the public availability of exploit code. This vulnerability could also facilitate lateral movement within networks, escalating the impact beyond the initially compromised device. The potential for widespread service outages and data compromise makes this a significant threat to European network security and operational continuity.

Given the absence of an official patch from H3C, European organizations should implement immediate compensating controls. These include isolating affected H3C Magic B0 devices from untrusted networks and restricting access to the /goform/aspForm endpoint via network segmentation and firewall rules. Deploy strict input validation and intrusion detection/prevention systems (IDS/IPS) to monitor and block suspicious traffic targeting the vulnerable function. Regularly audit device configurations and logs for signs of exploitation attempts. Where possible, replace or upgrade affected devices to newer, patched models or alternative vendors with timely security support. Implement network-level anomaly detection to identify unusual behavior indicative of exploitation. Maintain up-to-date backups and incident response plans to minimize impact in case of compromise. Engage with H3C support channels persistently to seek official remediation and monitor threat intelligence feeds for updates or new exploit variants.