Never Gonna Print You Up
Summary
Paraphrased summary of Yannick Dixken s November 2026 security blog post about coordinated responsible disclosure of 14 plus firmware vulnerabilities in Prusa 3D printers (MK4S and others). The author reports a chain of bugs enabling remote code execution on the printer main controller via Prusa Connect, and details the disclosure process with Prusa, the patch timeline, and the final firmware fix. The piece also covers what Prusa did right in handling the disclosure, the broader implications for IoT and embedded device security, and the author s reflections on the role of AI in vulnerability research and open source software safety.