CVE-2026-2066 identifies a buffer overflow vulnerability in the UTT 进取 520W device firmware version 1.7.7-180627. The flaw exists in the strcpy function call within the /goform/formIpGroupConfig endpoint, specifically when processing the groupName parameter. Since strcpy does not perform bounds checking, an attacker can supply an overly long groupName value to overflow the buffer, corrupting adjacent memory. This can lead to arbitrary code execution or system crashes. The vulnerability is remotely exploitable without authentication or user interaction, making it highly accessible to attackers. The vendor was contacted but has not issued any patches or advisories, and a public exploit is available, increasing the risk of active exploitation. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P) reflects network attack vector, low complexity, no authentication, no user interaction, and high impact on confidentiality, integrity, and availability. The affected product is primarily used in network infrastructure, potentially impacting enterprise and industrial environments. Lack of vendor response and public exploit availability heighten the urgency for mitigation.

For European organizations, this vulnerability could lead to severe consequences including unauthorized remote code execution, full system compromise, or denial of service on affected UTT 进取 520W devices. Given the device's role in network infrastructure, exploitation could disrupt critical communications, compromise sensitive data, and enable lateral movement within networks. Industrial and enterprise sectors relying on these devices for network management or security could face operational downtime and data breaches. The absence of vendor patches increases the risk of exploitation by threat actors, including cybercriminals and state-sponsored groups. The public availability of exploits further elevates the threat, potentially leading to widespread attacks. Organizations in sectors such as telecommunications, manufacturing, and government infrastructure in Europe could be particularly impacted if these devices are deployed. The vulnerability undermines confidentiality, integrity, and availability, posing a comprehensive risk to affected networks.

1. Immediately isolate and monitor all UTT 进取 520W devices running version 1.7.7-180627 to detect suspicious activity targeting /goform/formIpGroupConfig. 2. Implement network segmentation and access control lists to restrict access to management interfaces of these devices from untrusted networks. 3. Employ Web Application Firewalls (WAFs) or Intrusion Prevention Systems (IPS) with custom rules to detect and block exploit attempts targeting the groupName parameter. 4. Disable or restrict remote management interfaces if not essential, or enforce VPN and multi-factor authentication for remote access. 5. Conduct thorough inventory and asset management to identify all affected devices within the organization. 6. Engage with UTT or third-party security vendors for potential unofficial patches or mitigation scripts. 7. Prepare incident response plans specifically addressing exploitation scenarios of this vulnerability. 8. Monitor threat intelligence feeds for updates on exploit activity or vendor patch releases. 9. Consider device replacement if no vendor support or patch is forthcoming and risk is unacceptable. 10. Educate network administrators on the vulnerability and signs of exploitation to enhance detection capabilities.