From Day Zero to Zero Day: A Hands-On Guide to Vulnerability Research

By: Eugene Lim

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Synopsis: Find vulnerabilities before anyone else does.Zero days aren&’t magic—they&’re missed opportunities. From Day Zero to Zero Day teaches you how to find them before anyone else does.In this hands-on guide, award-winning white-hat hacker Eugene &“Spaceraccoon&” Lim breaks down the real-world process of vulnerability discovery. You&’ll retrace the steps behind past CVEs, analyze open source and embedded targets, and build a repeatable workflow for uncovering critical flaws in code.Whether you&’re new to vulnerability research or sharpening an existing skill set, this book will show you how to think—and work—like a bug hunter.You&’ll learn how to:Identify promising targets across codebases, protocols, and file formats. Trace code paths with taint analysis and map attack surfaces with precision.Reverse engineer binaries using Ghidra, Frida, and angr.Apply coverage-guided fuzzing, symbolic execution, and variant analysis.Build and validate proof-of-concept exploits to demonstrate real-world impact.More than a toolkit, this is a window into how top vulnerability researchers approach the work. You&’ll gain not just techniques but also the mindset to go deeper, ask better questions, and find what others miss.If you&’re ready to stop reading write-ups and start writing them, From Day Zero to Zero Day is your guide.