CompTIA CySA+ CS0-004 Study Guide

The first study guide written for the new CompTIA CySA+ CS0-004 Cybersecurity Analyst certification exam.

The CS0-004 launches in June 2026, and the major publishers won't catch up until late 2026. You need to pass before then. This is the first independently published study guide written specifically for the new CompTIA CySA+ exam. If you are a SOC analyst, vulnerability engineer, or Security+ holder ready to step up, you cannot afford to study from a CS0-003 book that ignores AI risks, modern cloud-native architecture, and the updated attack taxonomy that CompTIA built into the new objectives.

What you will learn:
• Detect malicious activity across network, host, identity, application, and cloud layers (LOLBins, BEC, impossible travel, data exfiltration patterns)
• Operate the analyst toolchain CompTIA actually tests: Wireshark, Snort, Suricata, Zeek, Nessus, YARA, CyberChef, VirusTotal, MISP
• Apply MITRE ATT&CK, the Pyramid of Pain, and STRIDE to real hypothesis-driven threat hunts
• Score, prioritise, and remediate vulnerabilities using CVSS in business context (not in a vacuum)
• Run the full NIST SP 800-61 incident response lifecycle from preparation through lessons learned
• Handle the AI-specific risks now in scope: prompt injection, data poisoning, hallucinations, and AI governance in the SOC

What's inside:
• Full coverage of all four CS0-004 domains, weighted to match the exam (Security Operations 34%, Vulnerability Management 26%, Incident Response 24%, Reporting 16%)
• Two complete 85-question practice exams (170 questions total) with detailed answer explanations and domain mapping
• Scenario-based questions modelled on CompTIA's performance-based question (PBQ) format, with log snippets, scan output, and incident timelines
• A final-day Quick Reference chapter with framework cheatsheets, the top 20 tools, and a 60+ acronym glossary
• Three study plans (30, 60, and 90 days) you can pick up and follow without rebuilding your week

Who this book is for: Security+ holders moving into analyst-level work, working SOC Tier 1 and Tier 2 analysts validating their skills with a recognised cert, military, government, and contractor staff mapping to DoD 8140 cyber defence roles, and career changers from networking or sysadmin backgrounds with three to four years of IT experience.

Why this book is different. Most guides spread content evenly across topics, so candidates over-prepare on light domains and walk into the exam blind on the heavy ones. This book mirrors the exam blueprint exactly: depth follows weight. It is also the only CS0-004 guide on the market that fully covers AI in security operations, because those topics simply did not exist in the previous exam.

Walk into the testing centre knowing you studied the right cybersecurity analyst exam, in the right proportions, with the only guide written for the version you are actually sitting.