Unpatched Calix flaw lets hackers bypass NAT to expose internal devices

An unpatched vulnerability in Calix GS7 XGS (GS5239XG) residential routers used by multiple U.S. broadband providers allows remote, unauthenticated attackers to create port-forwarding rules that can expose local network devices to the public internet. The flaw remains unpatched, posing a significant security risk to affected users.