CVE-2026-2086 identifies a critical buffer overflow vulnerability in the UTT HiPER 810G network device, specifically in the management interface component. The flaw resides in the strcpy function within the /goform/formFireWall endpoint, where improper handling of the GroupName argument allows an attacker to overflow the buffer. This vulnerability 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 or denial of service, severely compromising the device's confidentiality, integrity, and availability. The affected version is 1.7.7-171114 and earlier, with no vendor patch available as of the publication date. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and high impact on confidentiality, integrity, and availability (VC:H/VI:H/VA:H). The exploit is publicly available, increasing the likelihood of active exploitation. The vendor was contacted but did not respond, leaving organizations reliant on mitigation strategies rather than patches. This vulnerability is particularly concerning for environments where UTT HiPER 810G devices manage firewall configurations or other critical network functions.

For European organizations, the impact of CVE-2026-2086 is significant due to the potential for remote code execution and denial of service on network management devices. Compromise of the UTT HiPER 810G could allow attackers to manipulate firewall rules, intercept or redirect traffic, or disrupt network availability, leading to data breaches, operational downtime, and loss of trust. Critical infrastructure operators, enterprises, and service providers using this device may face severe operational and reputational damage. The lack of vendor response and patch availability prolongs exposure, increasing risk. Additionally, the public availability of exploits lowers the barrier for attackers, including cybercriminals and nation-state actors, to target vulnerable systems. The confidentiality of sensitive network configurations and the integrity of firewall policies are at high risk, potentially enabling lateral movement within networks or facilitating further attacks. Availability impacts could disrupt business continuity and critical services, especially in sectors like finance, healthcare, and government.

Given the absence of an official patch, European organizations should implement immediate compensating controls. First, restrict network access to the management interface of UTT HiPER 810G devices by isolating them on dedicated management VLANs or physically separate networks. Disable remote management access where feasible or limit it to trusted IP addresses via firewall rules. Employ network intrusion detection and prevention systems (IDS/IPS) to monitor and block exploit attempts targeting the /goform/formFireWall endpoint. Regularly audit device configurations and logs for suspicious activity. Consider deploying web application firewalls (WAF) to filter malicious payloads targeting the vulnerable strcpy function. If possible, replace or upgrade affected devices to versions not impacted by this vulnerability once available. Engage with UTT or third-party security vendors for potential unofficial patches or workarounds. Maintain up-to-date backups of device configurations to enable rapid recovery in case of compromise. Finally, raise awareness among network and security teams about this vulnerability and the importance of monitoring for exploitation attempts.