CVE-2026-2066 identifies a buffer overflow vulnerability in the UTT 进取 520W device firmware version 1.7.7-180627. The vulnerability arises from improper handling of the groupName parameter in the strcpy function within the /goform/formIpGroupConfig endpoint. Since strcpy does not perform bounds checking, an attacker can supply an overly long groupName argument, causing a buffer overflow. This flaw can be exploited remotely without authentication or user interaction, allowing attackers to potentially execute arbitrary code, crash the device, or disrupt its normal operation. The vulnerability affects the confidentiality, integrity, and availability of the device and any network relying on it. The CVSS v4.0 base score is 8.7, reflecting the high impact and ease of exploitation. Despite early vendor notification, no patch or mitigation has been released, and a public exploit is available, increasing the urgency for defensive measures. The device is typically used in network infrastructure roles, making exploitation potentially impactful on enterprise or service provider networks.

The vulnerability allows remote attackers to cause buffer overflow, which can lead to arbitrary code execution, device crashes, or denial of service. This compromises the confidentiality, integrity, and availability of the affected device and potentially the broader network. Exploitation could enable attackers to gain control over the device, intercept or manipulate network traffic, or disrupt critical network services. Given the device’s role in network infrastructure, successful exploitation could impact organizational operations, data security, and service continuity. The public availability of an exploit increases the likelihood of attacks, especially against unpatched or unmanaged devices. The lack of vendor response and patching further exacerbates the risk, leaving organizations exposed to persistent threats.

Since no official patch or vendor response is available, organizations should implement network-level mitigations. These include isolating the affected devices from untrusted networks, restricting access to the /goform/formIpGroupConfig endpoint via firewall rules or access control lists, and monitoring network traffic for suspicious activity targeting this endpoint. Employing intrusion detection or prevention systems with signatures for this exploit can help detect or block attempts. Where possible, replace or upgrade affected devices to versions or models without this vulnerability. Conduct regular network segmentation to limit the blast radius of a compromised device. Additionally, organizations should maintain strict device inventory and asset management to identify and prioritize vulnerable devices for remediation or replacement. Engaging with UTT or third-party security vendors for potential unofficial patches or workarounds may also be beneficial.