IT Security Assessment Checklist

Knowing your actual security posture requires a structured assessment against recognized frameworks — not gut feel or informal walkthroughs. This IT Security Assessment Checklist covers 145 security controls across 12 domains, mapped to NIST Cybersecurity Framework and ISO 27001 Annex A controls. Each control is scored on a 0–4 maturity scale (Non-existent, Initial, Developing, Defined, Optimizing), giving you a quantified security maturity score at the domain and overall level.

The 12 domains cover the complete enterprise security landscape: Access Control, Asset Management, Change Management, Cryptography, Human Resources Security, Incident Management, Information Security Policies, Network Security, Physical Security, Risk Management, Supplier Security, and Systems & Application Security. For each domain, failing controls feed directly into a prioritized action plan tracker with assigned owners and target dates. An evidence repository tab tracks what documentation supports each control assessment, making this checklist audit-ready for external assessors. Pair this with the [Vendor Risk Assessment](/templates/vendor-risk-assessment) to extend your security assessment program to third parties.