NIST CSF Mapper

What Is the NIST Cybersecurity Framework

The NIST Cybersecurity Framework (CSF) is a voluntary framework developed by the National Institute of Standards and Technology that provides organizations with a structured approach to managing cybersecurity risk. Originally published in 2014 and updated to CSF 2.0 in 2024, the framework is used by organizations of all sizes across all industries — though it was originally developed for critical infrastructure sectors.

The framework's strength is its flexibility: it does not prescribe specific technologies or controls. Instead, it organizes cybersecurity activities into six core functions that provide a high-level strategic view of an organization's security lifecycle. This tool maps your existing security controls to the NIST CSF functions and categories, identifying gaps and priorities.

NIST CSF 2.0 Core Functions

Function	Purpose	Key Activities
Govern (GV)	Establish and monitor cybersecurity risk management strategy	Risk management strategy, roles and responsibilities, policies, oversight
Identify (ID)	Understand your cybersecurity risk context	Asset management, risk assessment, supply chain risk management
Protect (PR)	Implement safeguards to manage risk	Access control, awareness training, data security, platform security
Detect (DE)	Find cybersecurity events when they occur	Continuous monitoring, adverse event analysis
Respond (RS)	Take action when incidents are detected	Incident management, analysis, mitigation, reporting
Recover (RC)	Restore operations after incidents	Recovery planning, execution, communication

Framework Tiers (Maturity Levels)

Tier	Name	Description
1	Partial	Ad hoc, reactive; limited awareness of cybersecurity risk
2	Risk Informed	Risk awareness exists but not formalized organization-wide
3	Repeatable	Formal policies and processes; regularly updated based on risk
4	Adaptive	Continuous improvement; real-time risk response; lessons learned integrated

Common Use Cases

• Security program assessment: Map your current security controls to CSF functions and categories to identify gaps and prioritize improvements
• Compliance alignment: Use CSF as a common framework to demonstrate alignment with multiple regulatory requirements (HIPAA, PCI DSS, CMMC share many CSF mappings)
• Board reporting: Communicate security posture to executives and boards using the CSF's clear function-based structure and tier system
• Vendor evaluation: Assess third-party security maturity by requesting their CSF self-assessment or mapping their controls to CSF categories
• Incident response maturity: Evaluate your Detect, Respond, and Recover capabilities against CSF requirements and identify improvement areas

Best Practices

1. Start with Identify and Govern — You cannot protect what you do not know about. Complete asset inventory and governance before investing in advanced Protect and Detect capabilities.
2. Use CSF Profiles — Create Current and Target profiles to visualize gaps. A Current profile documents existing capabilities; a Target profile defines desired outcomes based on business requirements.
3. Map to Implementation Tiers realistically — Self-assessing at Tier 4 when you are actually Tier 2 prevents improvement. Honest assessment drives meaningful progress.
4. Cross-reference with NIST 800-53 — CSF provides strategic guidance. NIST SP 800-53 provides specific controls. Map CSF categories to 800-53 controls for actionable implementation steps.
5. Review after every significant incident — Post-incident reviews should update your CSF mapping to reflect lessons learned and identify functions that need strengthening.