During an IP scan of all possible IPv4 addresses, Rapid7, the security firm that is known for the Metasploit attack framework, has discovered 40 to 50 million network devices that can potentially be compromised remotely with a single data packet.
The company says that remote attackers can potentially inject code into these devices, and that this may, for example, enable them to gain unauthorised access to a user's local network. All kinds of network-enabled devices including routers, IP cameras, NAS devices, printers, TV sets and media servers are affected.

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