CVE-2026-2067 identifies a buffer overflow vulnerability in the UTT 进取 520W device, version 1.7.7-180627. The vulnerability resides in the strcpy function call within the /goform/formTimeGroupConfig endpoint, where the 'year1' parameter is not properly bounds-checked. An attacker can remotely send a crafted request to this endpoint, causing a buffer overflow that may lead to arbitrary code execution or denial of service. The vulnerability requires no authentication or user interaction, making it highly exploitable over the network. The CVSS 4.0 score of 8.7 reflects its critical nature, with high impact on confidentiality, integrity, and availability. The vendor was contacted but has not provided a patch or mitigation guidance, and public exploit code has been disclosed, increasing the risk of exploitation. This vulnerability affects a specific firmware version, and no known exploits are currently observed in the wild, but the public disclosure raises the likelihood of imminent attacks.

For European organizations, this vulnerability poses a significant risk to network infrastructure relying on UTT 进取 520W devices. Successful exploitation could allow attackers to execute arbitrary code, potentially gaining control over affected devices, disrupting network operations, or exfiltrating sensitive data. This could impact critical services, especially in sectors like telecommunications, manufacturing, and government agencies that may deploy such equipment. The lack of vendor response and patch availability increases the window of exposure. Additionally, the remote and unauthenticated nature of the attack vector makes it easier for threat actors to target these devices at scale, potentially leading to widespread outages or breaches within European networks.

Organizations should immediately identify and isolate all UTT 进取 520W devices running firmware version 1.7.7-180627. Network segmentation and access control lists should be implemented to restrict access to the /goform/formTimeGroupConfig endpoint, limiting exposure to untrusted networks. Deploying web application firewalls (WAFs) or intrusion prevention systems (IPS) with custom rules to detect and block malformed requests targeting the 'year1' parameter can reduce risk. Monitoring network traffic for unusual activity related to this endpoint is advised. Since no official patch is available, organizations should consider temporary device replacement or firmware rollback if a secure version exists. Engaging with UTT or third-party security vendors for potential unofficial patches or mitigations is recommended. Regular backups and incident response plans should be updated to prepare for potential exploitation.