CVE-2025-7571 is a critical buffer overflow vulnerability identified in the UTT HiPER 840G device, specifically affecting versions up to 3.1.1-190328. The vulnerability resides in an unspecified component of the /goform/aspApBasicConfigUrcp endpoint, where improper handling of the 'Username' argument allows an attacker to trigger a buffer overflow condition. This flaw can be exploited remotely without requiring authentication or user interaction, making it highly accessible to attackers. The buffer overflow can lead to arbitrary code execution, potentially allowing an attacker to take full control of the affected device. The CVSS v4.0 score of 8.7 reflects a high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and high impacts on confidentiality, integrity, and availability. Despite early notification, the vendor has not responded or released a patch, increasing the risk of exploitation. Although no confirmed exploits have been observed in the wild yet, the public disclosure of the exploit code raises the likelihood of imminent attacks. The vulnerability affects a network device product, which is likely used in enterprise or industrial environments, making it a significant threat to organizations relying on this hardware for critical network infrastructure.

For European organizations, the impact of this vulnerability could be severe. The UTT HiPER 840G is presumably deployed in network infrastructure roles such as routing, switching, or wireless access, and compromise could lead to unauthorized access, data exfiltration, network disruption, or lateral movement within corporate networks. Confidentiality breaches could expose sensitive corporate or customer data, while integrity and availability impacts could disrupt business operations, causing downtime and financial losses. The lack of vendor response and patch availability means organizations must rely on mitigations or device replacement to reduce risk. Given the remote and unauthenticated nature of the exploit, attackers can target vulnerable devices from anywhere, increasing the threat surface. European entities in critical sectors such as telecommunications, manufacturing, and government infrastructure that utilize UTT devices may face heightened risk, potentially affecting national security and economic stability.

Since no official patch is currently available, European organizations should immediately identify and inventory all UTT HiPER 840G devices running affected versions. Network segmentation should be enforced to isolate these devices from untrusted networks and limit exposure. Implement strict access controls and firewall rules to restrict inbound traffic to management interfaces, especially the /goform/aspApBasicConfigUrcp endpoint. Deploy intrusion detection/prevention systems (IDS/IPS) with signatures tuned to detect exploitation attempts targeting this vulnerability. Regularly monitor device logs for anomalous activity indicative of exploitation. If possible, disable or restrict access to the vulnerable endpoint or service until a patch is released. Consider replacing affected devices with alternative hardware from vendors with active security support if mitigation is not feasible. Maintain up-to-date backups and incident response plans to quickly recover from potential compromises. Engage with UTT or third-party security vendors for potential unofficial patches or workarounds.