CVE-2025-11651 identifies a critical buffer overflow vulnerability in the UTT 进取 518G device, specifically in firmware version V3v3.2.7-210919-161313. The vulnerability resides in the sub_4247AC function of the /goform/formRemoteControl endpoint, where the 'Profile' parameter is improperly validated, allowing an attacker to supply crafted input that overflows a buffer. This overflow can corrupt memory, potentially enabling remote code execution or causing a denial of service. The attack vector is network-based, requiring no authentication or user interaction, making exploitation feasible by any remote attacker with network access to the device. The vulnerability was responsibly disclosed to the vendor, who has not issued a patch or response. The exploit code has been publicly released, increasing the risk of exploitation. The CVSS 4.0 score of 8.7 reflects the high impact on confidentiality, integrity, and availability, combined with low attack complexity and no prerequisites. The lack of vendor response and patch availability exacerbates the threat. Given the device’s role in network management or control, successful exploitation could compromise network security, disrupt operations, or allow lateral movement within affected environments.

For European organizations, this vulnerability poses significant risks, especially for those deploying UTT 进取 518G devices in critical network infrastructure or industrial environments. Exploitation could lead to unauthorized remote code execution, allowing attackers to take control of affected devices, intercept or manipulate network traffic, and disrupt services. This could result in data breaches, operational downtime, and damage to organizational reputation. The absence of vendor patches increases exposure time, and public exploit availability raises the likelihood of attacks. Organizations in sectors such as telecommunications, manufacturing, and government that rely on these devices for network management are particularly vulnerable. The impact extends to supply chain security, as compromised devices could serve as entry points for broader attacks. The confidentiality, integrity, and availability of network operations could be severely compromised, potentially affecting compliance with European data protection regulations and cybersecurity directives.

Given the lack of official patches, European organizations should implement immediate compensating controls. These include isolating affected UTT 进取 518G devices from untrusted networks and restricting access to management interfaces using network segmentation and strict firewall rules. Deploy intrusion detection/prevention systems (IDS/IPS) tuned to detect exploit attempts targeting the /goform/formRemoteControl endpoint. Monitor network traffic for anomalous patterns indicative of buffer overflow exploitation. Where possible, disable or restrict the vulnerable functionality if the device configuration allows. Maintain up-to-date asset inventories to identify all affected devices. Engage with UTT or authorized resellers to seek firmware updates or mitigation guidance. Consider deploying network-level mitigations such as application-layer gateways or reverse proxies to filter malicious payloads. Prepare incident response plans specific to this vulnerability, including rapid isolation and forensic analysis procedures. Finally, evaluate alternative hardware solutions if vendor support remains absent.