CVE-2025-15430 is a remote buffer overflow vulnerability identified in the UTT 进取 512W device, specifically in firmware version 1.7.7-171114. The vulnerability stems from improper handling of the oldfilename parameter in the strcpy function within the /goform/formFtpServerShareDirSelcet endpoint. strcpy does not perform bounds checking, allowing an attacker to supply an overly long string that overflows the buffer, corrupting adjacent memory. This memory corruption can lead to arbitrary code execution or cause the device to crash, resulting in denial of service. The vulnerability is exploitable remotely without requiring authentication or user interaction, increasing its risk profile. The CVSS 4.0 score of 8.7 reflects high impact on confidentiality, integrity, and availability, with low attack complexity and no privileges or user interaction needed. Despite early notification, the vendor has not issued a patch or mitigation guidance, and a public exploit is available, increasing the likelihood of exploitation. The affected product is a network device, likely used in enterprise or industrial environments, making the vulnerability critical for operational continuity and data security.

For European organizations, exploitation of this vulnerability could lead to severe consequences including unauthorized remote code execution, allowing attackers to gain control over affected devices. This can compromise network integrity, enable lateral movement within corporate or industrial networks, and lead to data exfiltration or sabotage. Denial of service caused by crashes could disrupt critical services, impacting business operations and potentially safety systems if used in industrial control environments. The lack of vendor response and available exploit code heightens the threat, as attackers can weaponize this vulnerability quickly. Organizations relying on UTT 进取 512W devices in their infrastructure face increased risk of targeted attacks, especially in sectors such as telecommunications, manufacturing, and critical infrastructure. The vulnerability’s remote and unauthenticated nature makes it a prime target for widespread scanning and exploitation campaigns.

Given the absence of an official patch, European organizations should implement immediate compensating controls. These include isolating the vulnerable devices on segmented networks with strict access controls to limit exposure. Disable or restrict access to the /goform/formFtpServerShareDirSelcet endpoint if possible, or block related FTP server share directory selection services at the network perimeter. Employ intrusion detection and prevention systems (IDS/IPS) tuned to detect exploit attempts targeting this vulnerability. Regularly monitor device logs and network traffic for anomalous activity indicative of exploitation attempts. Engage with UTT or third-party security vendors for potential unofficial patches or firmware updates. Plan for device replacement or firmware upgrade once a vendor fix becomes available. Additionally, conduct thorough asset inventories to identify all affected devices and prioritize remediation efforts accordingly.