Hacker achieves full remote code execution on a Prusa MK4S printer

Never Gonna Print You Up

A security researcher spent a week breaking into his own Prusa MK4S and found 14 vulnerabilities, including a remote code execution flaw in Prusa Connect that lets an attacker run code on the printer's main controller. The bugs were reported to Prusa, fixed in firmware 7.0.0, and are now public. The write-up details the methods, the disclosure process, and the most serious exploits.