CVE-2016-6277

Think of your router like the “front desk” for your internet connection. This bug lets attackers send a specially crafted request to the router’s web-based control area so the router will run commands chosen by the attacker. That can let them take over the router, disrupt internet service, and potentially use your network connection for further attacks.

This matters if your business uses any of the listed NETGEAR router models and they’re running firmware older than the secure versions referenced for CVE-2016-6277. The flaw is reachable over the network from the internet (no login required), because attackers can interact with the router’s exposed configuration web endpoint using a crafted URL. It’s a risk when the router is reachable from the network/internet where the vulnerable web interface can be accessed.

This is RED because confirmed real-world exploitation is reported and it’s listed in CISA’s Known Exploited Vulnerabilities set. Attackers can remotely run arbitrary commands by manipulating the URL path that reaches the router’s cgi-bin/ endpoint, so unpatched routers are actively attractive targets. Treat this as an immediate patching priority.