CS0-003 is the version-3 exam code for CompTIA CySA+ (Cybersecurity Analyst+). "CS0" denotes the CySA+ series and "003" the V3 revision. It validates security-analyst skills in threat detection, monitoring, and incident response.
What it means
CySA+ stands for Cybersecurity Analyst+; CS0-003 is its V3 exam. CompTIA's official page frames it as an intermediate, defensive-security credential focused on behavioral threat detection, security monitoring, and response — generally pursued after foundational security knowledge rather than as a first credential. Version note: CompTIA has released the newer CS0-004 (V4) exam, and the same official page lists the V3 (CS0-003) version as retiring on December 22, 2026 — confirm which version is offered on CompTIA's site before you register.