IoT devices integrated into LANs often automatically establish a connection to the Internet by configuring routers in their network using UPnP (universal plug-and-play) to facilitate port forwarding. The devices can then not only communicate in the local network, but are also visible and accessible outside the LAN. If a vulnerability in an IoT device is then exploited by an attacker, this device could become part of a botnet. In addition, further malware could be infiltrated into the corresponding information domain. This vulnerability could also be exploited at a later time for further malicious activities.