Skip to Content
From Day Zero to Zero Day
book

From Day Zero to Zero Day

by Eugene Lim
August 2025
Beginner to intermediate
344 pages
9h 26m
English
No Starch Press

Overview

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.

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

AirBnbBlueOriginElectronic ArtsHomeDepotNasdaqRakutenTata Consultancy Services

QuotationMarkO’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
QuotationMarkI wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
QuotationMarkI’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
QuotationMarkI'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Mark W.
Embedded Software Engineer

You might also like

Modern Automated AI Agents: Building Agentic AI to Perform Complex Tasks

Modern Automated AI Agents: Building Agentic AI to Perform Complex Tasks

Sinan Ozdemir

Publisher Resources

ISBN: 9798341655140Errata Page