CVE-2025-15431 is a buffer overflow vulnerability identified in the UTT 进取 512W device, version 1.7.7-171114. The vulnerability arises from improper handling of the filename parameter in the strcpy function within the /goform/formFtpServerDirConfig endpoint. Since strcpy does not perform bounds checking, an attacker can supply an overly long filename argument to overflow the buffer, potentially overwriting adjacent memory. This can lead to arbitrary code execution, allowing an attacker to execute malicious payloads remotely without authentication or user interaction. The vulnerability is exploitable over the network, making it a critical risk for exposed devices. The vendor was contacted but has not provided a patch or mitigation guidance. The CVSS 4.0 score is 8.7 (high), reflecting the ease of exploitation and the severe impact on confidentiality, integrity, and availability. The exploit has been published, increasing the likelihood of active exploitation. The affected device is commonly used in certain industrial and enterprise environments, where such a compromise could disrupt operations or lead to data breaches.

For European organizations, this vulnerability poses a significant threat, especially for those deploying UTT 进取 512W devices in critical infrastructure, manufacturing, or enterprise network environments. Successful exploitation could allow attackers to gain unauthorized control over affected devices, leading to data theft, disruption of services, or use of compromised devices as footholds for lateral movement within networks. The lack of vendor response and patch availability increases exposure time. Given the remote and unauthenticated nature of the exploit, attackers can target vulnerable devices directly from the internet or internal networks. This could result in operational downtime, loss of sensitive information, and potential regulatory non-compliance under GDPR if personal data is compromised. The published exploit code further elevates the risk of widespread attacks.

1. Immediately isolate UTT 进取 512W devices from untrusted networks, especially the internet, to reduce exposure. 2. Implement strict network segmentation and firewall rules to restrict access to the /goform/formFtpServerDirConfig endpoint only to trusted management hosts. 3. Deploy intrusion detection/prevention systems (IDS/IPS) with signatures to detect attempts to exploit this buffer overflow. 4. Monitor network traffic and device logs for unusual or malformed requests targeting the FTP server configuration interface. 5. If possible, disable or restrict FTP server configuration functionality until a vendor patch is available. 6. Engage with UTT or authorized resellers to seek firmware updates or official mitigation guidance. 7. Consider replacing vulnerable devices with alternative products from vendors with active security support if remediation is not forthcoming. 8. Conduct regular vulnerability assessments and penetration tests focusing on network-exposed devices to identify similar risks.