The CERT Coordination Center (CERT/CC) has disclosed details concerning a critical, unpatched security flaw impacting the TOTOLINK EX200 wireless range extender. The vulnerability, designated CVE-2025-65606, stems from a flaw in the device’s firmware-upload error-handling logic, potentially allowing a remote authenticated attacker to achieve full remote device takeover.
While Web3 security primarily focuses on blockchain integrity, compromised user-side network infrastructure presents a direct and often overlooked vector for asset theft. A device takeover, especially on an edge network component like an extender, grants the attacker supreme privileges. This enables sophisticated exploits such as DNS hijacking, redirecting users to malicious decentralized finance (DeFi) platforms, executing Man-in-the-Middle attacks against critical RPC nodes, and intercepting sensitive traffic that could reveal local machine access details or, ultimately, wallet seed phrases.
As the flaw remains unpatched (CVSS score currently N/A but impact is severe), users of the TOTOLINK EX200 are strongly advised to immediately isolate the device from critical networks or replace it entirely. This incident underscores that the security perimeter for decentralized assets begins not on the blockchain, but with robust management of conventional network hardware risks.
Source: Unpatched Firmware Flaw Exposes TOTOLINK EX200 to Full Remote Device Takeover
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