CVE-2025-4135 is a command injection vulnerability affecting the Netgear WG302v2 wireless access point devices running firmware versions 5.2.0 through 5.2.9. The vulnerability resides in the function ui_get_input_value, where improper sanitization of the 'host' argument allows an attacker to inject arbitrary commands. This flaw can be exploited remotely without requiring user interaction or authentication, as indicated by the CVSS vector (AV:N/AC:L/AT:N/UI:N/PR:L). The vulnerability allows an attacker with low privileges to execute commands on the underlying operating system, potentially leading to unauthorized access, data manipulation, or disruption of device functionality. The vendor was contacted early but has not responded or released patches, and no known exploits have been reported in the wild as of the publication date (April 30, 2025). The CVSS 4.0 base score is 5.3, reflecting medium severity due to limited scope and privileges required. However, the ability to execute commands remotely without user interaction poses a significant risk to the confidentiality, integrity, and availability of affected devices and connected networks. The vulnerability does not require user interaction but does require low-level privileges, which may be obtained through other means or default credentials. The lack of vendor response and patch availability increases the risk for organizations relying on these devices. Given the role of WG302v2 as a wireless access point, exploitation could allow attackers to pivot into internal networks, intercept or manipulate traffic, or disrupt wireless connectivity.

For European organizations, exploitation of CVE-2025-4135 could lead to unauthorized command execution on Netgear WG302v2 devices, compromising network security and potentially enabling lateral movement within corporate or public networks. This could result in data breaches, service disruptions, or manipulation of network traffic. Since WG302v2 devices are often deployed in small to medium-sized enterprises, branch offices, or public Wi-Fi environments, the impact could extend to critical infrastructure sectors such as healthcare, finance, and government services that rely on secure wireless connectivity. The absence of vendor patches and the medium severity rating may lead to delayed remediation, increasing exposure time. Additionally, attackers could leverage this vulnerability to establish persistent access or launch further attacks against connected systems. The vulnerability's remote exploitation capability without user interaction makes it particularly dangerous in unattended or poorly monitored network environments common in some European organizations. Overall, the threat could degrade network availability, compromise sensitive information, and undermine trust in wireless infrastructure.

Given the lack of official patches from Netgear, European organizations should implement the following specific mitigation strategies: 1) Immediately identify and inventory all WG302v2 devices within the network to assess exposure. 2) Isolate affected devices on segmented network zones with strict access controls to limit potential lateral movement. 3) Disable remote management interfaces or restrict access to trusted IP addresses only, reducing the attack surface. 4) Employ network intrusion detection/prevention systems (IDS/IPS) with custom signatures to detect anomalous command injection attempts targeting the 'host' parameter. 5) Replace WG302v2 devices with newer, supported models that receive regular security updates, prioritizing critical infrastructure environments. 6) Enforce strong authentication mechanisms and change default credentials on all affected devices to reduce the risk of privilege escalation. 7) Monitor network traffic for unusual patterns indicative of exploitation attempts, including unexpected command executions or device reboots. 8) Engage with Netgear support channels persistently to demand patch releases or official guidance. 9) If feasible, implement virtual patching via firewall rules blocking suspicious payloads targeting the vulnerable function. These measures go beyond generic advice by focusing on network segmentation, active monitoring, and device replacement strategies tailored to the specific vulnerability and device role.