One Up Security, LLCThis was a presentation given at BSides Rochester in 2024. It goes over how we dumped the firmware, fuzzed the post script engine, and gained code execution by exploiting a memory corruption bug.
https://www.oneupsecurity.com/wp-content/uploads/2024/03/Lexmark-Printer-Remote-Code-Execution-via-Memory-Corruption-Presentation.pdf