or, how I found multiple vulnerabilities on a lazy Sunday afternoon Earlier this year the NSA released Ghidra, a reverse engineering suite with support for a large number of CPU/MCU instruction sets. While I have some experience with Hopper and radare2 I wanted to play with Ghidra to poke around the firmware for my Zyxel GS1900-8 switch which runs on a 32-bit MIPS CPU. All in all this has turned out to be an interesting exploration of both Ghidra and the GS1900-8-2.