A local network is the internal wired or Wi-Fi environment inside a home, office, or other organization. It is separate from the public internet and usually includes devices that can communicate directly with one another through a router, switch, or access point.
In cybersecurity, “local network only” access is still important because attackers often start from inside the perimeter. A compromised laptop, a rogue guest on Wi-Fi, or malware on another internal device may be enough to reach services that are not exposed to the internet. Many device flaws, especially in routers, printers, and other embedded systems, are only exploitable from the local network. Defenders use this boundary to reduce risk with segmentation, strong Wi-Fi authentication, guest networks, and patching of edge devices. When a vulnerability requires local access, it narrows the attack path, but it does not make the bug harmless.