CVE-2025-43984 is a critical remote code execution vulnerability affecting KuWFi GC111 devices, specifically hardware version CPE-LM321_V3.2 running software version GC111-GL-LM321_V3.0_20191211. The vulnerability arises from improper handling of unauthenticated HTTP POST requests to the /goform/goform_set_cmd_process endpoint. Attackers can craft a malicious POST request that manipulates the SSID parameter to inject arbitrary operating system commands. Due to the lack of authentication and the execution context running with root privileges, successful exploitation allows an attacker to execute arbitrary commands on the device with full administrative control. This can lead to complete compromise of the device, enabling attackers to manipulate network traffic, install persistent malware, or use the device as a pivot point for further attacks within the network. The vulnerability is present in a specific firmware and hardware combination, and no patches or mitigations have been officially released as of the publication date. No known exploits have been reported in the wild yet, but the ease of exploitation and the severity of impact make this a high-risk vulnerability.

For European organizations, this vulnerability poses a significant risk, especially for those using KuWFi GC111 devices in their network infrastructure. Compromise of these devices can lead to unauthorized access to internal networks, interception or manipulation of sensitive data, and disruption of network services. Given that these devices are often used in small office/home office (SOHO) or enterprise edge environments, attackers gaining root access could establish persistent backdoors or launch lateral movement attacks. The lack of authentication for the vulnerable endpoint increases the likelihood of automated exploitation attempts, potentially leading to widespread compromise. Additionally, organizations in sectors with strict data protection regulations such as GDPR may face compliance risks and reputational damage if breaches occur due to this vulnerability.

Immediate mitigation steps include isolating affected KuWFi GC111 devices from critical network segments and restricting access to the management interface to trusted IP addresses only. Network-level controls such as firewall rules should block incoming traffic to the /goform/goform_set_cmd_process endpoint from untrusted sources. Organizations should monitor network traffic for suspicious POST requests targeting this endpoint and implement intrusion detection signatures to detect exploitation attempts. Since no official patches are available, consider replacing vulnerable devices with updated hardware or firmware versions from the vendor once released. Additionally, conduct a thorough inventory of all KuWFi devices to identify and remediate vulnerable units. Employ network segmentation to limit the impact of a compromised device and enforce strict access controls. Regularly review device configurations and disable any unnecessary services or remote management features to reduce attack surface.