An issue was discovered on Topcon Positioning Net-G5 GNSS Receiver devices with firmware 5.2.2. The web interface of the product has a local file inclusion vulnerability. An attacker with administrative privileges can craft a special URL to read arbitrary files from the device's files system.
https://mezdanak.de/2019/06/21/iot-full-disclosure-topcon-positioning-net-g5-receiver/