An urgent advisory has been issued regarding active exploitation targeting a critical Remote Code Execution (RCE) vulnerability (CVE-2026-0625, CVSS Score: 9.3) found in legacy D-Link DSL gateway routers. This high-severity flaw permits an unauthenticated remote attacker to inject and execute arbitrary commands on affected devices. The vulnerability is specifically identified as a command injection within the “dnscfg.cgi” endpoint, stemming from the improper sanitization of user-supplied DNS configuration parameters.
While seemingly confined to traditional networking security, the implications for the Web3 ecosystem are critical. Despite the decentralized nature of blockchain, the ecosystem relies heavily on underlying physical and networking infrastructure. Successful exploitation of this RCE could compromise the home networks of node operators, protocol developers, or small Web3 infrastructure, serving as a sophisticated launchpad for supply chain attacks that lead indirectly to major bridge hacks or wallet drainings.
This incident underscores the inherent danger residing in the weakest link of the security chain. Even if smart contracts undergo rigorous audits, the overall security posture is undermined if the networking equipment used by core contributors or infrastructure providers remains vulnerable legacy hardware. Web3 security professionals must prioritize continuous auditing and patching of all operational infrastructure, applying the stringent validation principles reserved for the protocol layer to the entire operational stack.
Source: Ongoing Attacks Exploiting Critical RCE Vulnerability in Legacy D-Link DSL Routers
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