CVE-2026-1140 is a buffer overflow vulnerability identified in the UTT 进取 520W device, version 1.7.7-180627. The vulnerability arises from improper handling of input in the strcpy function within the /goform/ConfigExceptAli endpoint. Since strcpy does not perform bounds checking, specially crafted input can overflow the buffer, potentially overwriting adjacent memory. This flaw is remotely exploitable over the network without requiring authentication or user interaction, making it highly dangerous. The buffer overflow can lead to arbitrary code execution, allowing attackers to gain control over the device, or cause denial of service by crashing the system. The vulnerability has a CVSS 4.0 base score of 8.7, reflecting its high impact on confidentiality, integrity, and availability, combined with low attack complexity and no required privileges. The vendor was notified but has not responded or released a patch, and exploit code has been publicly disclosed, increasing the likelihood of active exploitation. The affected product is a network device likely used in enterprise or industrial environments, which could serve as a pivot point for attackers within a network.

For European organizations, the impact of CVE-2026-1140 is significant. Compromise of UTT 进取 520W devices could allow attackers to execute arbitrary code remotely, leading to full device takeover. This could disrupt network operations, leak sensitive data, or facilitate lateral movement within corporate or critical infrastructure networks. The vulnerability threatens confidentiality by exposing configuration or operational data, integrity by allowing unauthorized changes, and availability by causing device crashes or network outages. Given the device’s role in network infrastructure, exploitation could impact business continuity and critical services. The lack of vendor response and patches increases exposure time, making timely mitigation essential. Organizations in sectors such as telecommunications, manufacturing, and government using these devices face elevated risks. The public availability of exploit code further raises the threat level, potentially attracting opportunistic attackers and advanced persistent threats targeting European networks.

1. Immediately identify and inventory all UTT 进取 520W devices running version 1.7.7-180627 within the network. 2. Implement network segmentation to isolate affected devices from critical systems and limit exposure to untrusted networks. 3. Restrict access to the /goform/ConfigExceptAli endpoint using firewall rules or access control lists to prevent unauthorized remote requests. 4. Disable or restrict remote management interfaces if not essential, or enforce strict authentication and IP whitelisting. 5. Monitor network traffic and device logs for unusual activity targeting the vulnerable endpoint or signs of exploitation attempts. 6. Engage with UTT or authorized vendors to seek firmware updates or patches; if unavailable, consider device replacement or temporary removal from critical network segments. 7. Employ intrusion detection/prevention systems (IDS/IPS) with signatures for known exploits targeting this vulnerability. 8. Educate network administrators about the vulnerability and ensure incident response plans include steps for this threat. 9. Regularly review and update network device inventories and firmware to reduce exposure to unpatched vulnerabilities.