CVE-2026-2071 is a buffer overflow vulnerability identified in the UTT 进取 520W device firmware version 1.7.7-180627. The vulnerability arises from improper handling of input in the strcpy function within the /goform/formP2PLimitConfig endpoint. Specifically, the function copies user-supplied data without bounds checking, allowing an attacker to overflow the buffer by manipulating the input argument. This buffer overflow can lead to arbitrary code execution or denial of service. The vulnerability is remotely exploitable over the network without requiring authentication or user interaction, making it highly dangerous. The CVSS 4.0 score is 8.7 (high), reflecting the ease of exploitation and the potential for severe impact on confidentiality, integrity, and availability. The vendor was contacted early but has not responded or released a patch, and public exploit code is available, increasing the urgency for mitigation. The affected product is primarily used in network environments where it may serve as a critical device, thus amplifying the risk. No official patches or mitigations have been published, and the vulnerability remains unpatched at the time of disclosure.

This vulnerability allows remote attackers to execute arbitrary code or cause denial of service on affected UTT 进取 520W devices, potentially leading to full compromise. The impact includes loss of confidentiality due to unauthorized data access, loss of integrity through unauthorized modification of device configurations or firmware, and loss of availability by crashing or destabilizing the device. Organizations relying on these devices for network connectivity or security could face significant operational disruptions. The lack of vendor response and public exploit availability increases the likelihood of exploitation in the wild. Attackers could leverage this vulnerability to pivot into internal networks, exfiltrate sensitive data, or disrupt critical services, especially in environments where these devices are deployed as gateways or security appliances.

Since no official patch is available, organizations should immediately implement network-level protections such as restricting access to the vulnerable device's management interfaces to trusted IP addresses only. Deploy network segmentation to isolate the device from critical infrastructure and sensitive data. Monitor network traffic for suspicious activity targeting the /goform/formP2PLimitConfig endpoint. Employ intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics to detect exploitation attempts. Consider disabling or restricting the vulnerable service if feasible. Regularly back up device configurations and maintain incident response plans to quickly recover from potential compromises. Engage with UTT or authorized vendors for updates or firmware upgrades and stay alert for future patches. If possible, replace the affected device with a more secure alternative until a fix is available.