Explore a critical cybersecurity demonstration on Remote Code Execution (RCE) vulnerabilities in Python legacy dependencies presented by Andrea Brambilla at NDC Security 2025 in Oslo, Norway. Learn how writing code for legacy systems with challenging compatibility requirements can create dangerous security risks. Follow along with this practical 29-minute talk designed for anyone with basic software development knowledge, showing both how badly things can go wrong and essential prevention strategies. All materials needed to run this demonstration yourself are available at the GitHub repository (https://github.com/equinor/appsec-demo-rce-python), making this an excellent resource for team security training and awareness.