CVE-2025-4150 is a critical buffer overflow vulnerability identified in the Netgear EX6200 Wi-Fi range extender, specifically affecting firmware version 1.0.3.94. The vulnerability resides in the function sub_54340, where improper handling of the 'host' argument allows an attacker to overflow a buffer. This overflow can be triggered remotely without requiring user interaction or prior authentication, making exploitation relatively straightforward. The vulnerability's CVSS 4.0 score is 8.7, indicating a high severity level. The vector metrics show that the attack can be launched over the network (AV:N), requires low attack complexity (AC:L), no privileges (PR:L) but some privileges are needed (PR:L) according to the vector, no user interaction (UI:N), and results in high impact on confidentiality, integrity, and availability (VC:H/VI:H/VA:H). The vulnerability does not require any scope change (SC:N), and no special attack complexity or privileges beyond low are needed. The vendor was contacted early but did not respond or provide a patch, and as of the publication date, no known exploits are reported in the wild. The lack of a patch and vendor response increases the risk for users of this device. The Netgear EX6200 is a widely deployed consumer and small business Wi-Fi range extender, often used to improve wireless coverage in homes and offices. Exploitation of this vulnerability could allow remote attackers to execute arbitrary code, potentially leading to device compromise, network infiltration, or denial of service. Given the device’s role as a network infrastructure component, successful exploitation could facilitate lateral movement within affected networks or interception of network traffic.

For European organizations, the impact of CVE-2025-4150 can be significant, especially for small and medium enterprises (SMEs) and home office setups relying on the Netgear EX6200 for network extension. A compromised device could serve as a foothold for attackers to infiltrate internal networks, leading to data breaches, espionage, or disruption of business operations. The high impact on confidentiality, integrity, and availability means sensitive data could be exposed or altered, and network services could be disrupted. In sectors with strict data protection regulations such as GDPR, a breach originating from this vulnerability could result in regulatory penalties and reputational damage. Additionally, the lack of vendor response and patch availability increases the window of exposure, making timely mitigation critical. The vulnerability could also be leveraged in botnet campaigns or as part of multi-stage attacks targeting critical infrastructure or high-value targets within Europe.

Given the absence of an official patch from Netgear, European organizations should implement several specific mitigations: 1) Immediately identify and inventory all Netgear EX6200 devices running firmware version 1.0.3.94 within their networks. 2) Where possible, isolate these devices on segmented network zones with strict access controls to limit exposure to untrusted networks. 3) Disable remote management features and restrict management access to trusted IP addresses only. 4) Monitor network traffic for unusual patterns or signs of exploitation attempts targeting the 'host' parameter or related functions. 5) Consider replacing vulnerable devices with alternative hardware from vendors with active security support if patching is not forthcoming. 6) Employ network intrusion detection/prevention systems (IDS/IPS) with updated signatures to detect exploitation attempts once available. 7) Educate IT staff about the vulnerability and ensure incident response plans include steps for potential exploitation scenarios involving network infrastructure devices. 8) Regularly check for updates from Netgear or third-party security advisories for any forthcoming patches or workarounds.