The NIST Cybersecurity Framework (CSF) was designed to help organizations of all sizes manage and reduce their cybersecurity risk. It was originally developed to help protect critical U.S. infrastructure and has evolved into a widely adopted approach to managing cyber risk across government agencies, enterprises, and small businesses.
Even organizations that are not legally required to meet various compliance and regulatory standards are under increasing pressure from partners and customers to demonstrate effective and consistent security controls. This leads many to purse NIST compliance—the process of implementing the controls and practices that align with NIST guidance.
This guide explains the NIST CSF, explores the differences between NIST CSF, NIST 800-53, and NIST 800-171, and outlines how organizations can use NIST principles to strengthen their security, reduce risk, and support compliance efforts.
What is the NIST Cybersecurity Framework?
NIST CSF is designed to be used by any organization, regardless of size, industry, government, and nonprofit. It was initially published in 2014 and serves as a foundation for organizations to adopt cybersecurity best practices, either voluntarily or to meet regulatory and contractual requirements to better manage their cybersecurity risk.
NIST CSF includes the following components: CSF Core, Organizational Profiles, and Implementation Tiers.
NIST CSF 2.0 was released in 2024 with the addition of the Govern function, which emphasizes integrating cybersecurity risk into overall business governance, strategy, and leadership oversight. It also includes Cyber AI Profile (draft) to address modern cybersecurity opportunities and risks concerning AI.
The framework is technology and sector neutral, allowing it to be tailored to organizations of different sizes, industries, and cybersecurity maturity levels. Because each organization faces unique risks, threats, and vulnerabilities, this flexibility enables the CSF to be broadly applicable across a wide range of environments.
What does NIST compliance mean?
The NIST CSF is not a compliance standard or certification, but a voluntary framework designed to help organizations manage cybersecurity risk and provide guidelines to achieve those goals.
NIST compliance or alignment is a voluntary adoption of the CSF, as a flexible guide to improve your organization’s overall cybersecurity posture. NIST compliance is a requirement when adhering to specific and strict, NIST publications (800-53 and 800-171) as a legal or contractual requirement, typically when doing business with the federal government.
To demonstrate NIST compliance, organizations may perform a self-assessment of their own cybersecurity controls. In other cases, a formal audit conducted by an independent third-party auditor or government authority may be needed to verify compliance with documented proof.
The NIST CSF defines four implementation tiers that describe how well cybersecurity risk management is integrated into an organization:
Tier 1 (partial)
Security is ad hoc and prioritization is not formally based on business objectives or the threat environment. Limited awareness of cybersecurity risk at both the organization level and its suppliers.
Tier 2 (risk-informed)
Risk is understood but practices vary by department or business unit. Policies are established, but consistency across the organization is lacking. Cybersecurity information is shared within the organization on an informal basis.
Tier 3 (repeatable)
Policies and controls are formalized, documented, and consistently deployed across the entire organization. Risks are proactively managed and responded to effectively.
Tier 4 (adaptive)
The organization uses real time threat intelligence, analytics, and automation to adapt and defend against cybersecurity threats before damage is caused.
Cybersecurity practices are based upon previous and current cybersecurity activities and include lessons learned from past events. Information is constantly shared throughout the organization and with authorized third parties.
The six core functions of NIST CSF
The core functions are the backbone of the NIST CSF, offering a high-level understanding to a broader audience of executives, managers, and practitioners regardless of the cybersecurity expertise of the reader.
The information is provided in a neutral viewpoint and not specific to a particular field, which improves understanding and flexibility needed to address unique risks. All six functions should be addressed concurrently, and organizations should always be prepared to execute both Respond and Recover activities in the event of a cybersecurity incident.
NIST CSF Core is forward-looking and intended to apply to future changes in technology and environments.
Govern
An organization’s policies regarding cybersecurity risk management and expectations.
Outcomes are provided which helps an organization define what they can do to achieve the desired outcomes of the other five functions in the context of the goals of the organization, the current cybersecurity posture, and the oversight of cybersecurity policies.
Identify
An organization’s current assets, such as data, hardware, software, systems, and people.
Knowing the current assets enables the organization to prioritize the tasks necessary, based on the needs identified under the Govern core function, to improve the organization’s policies, processes, procedures, and practices that support cybersecurity risk management.
Protect
How an organization safeguards and secures its environment.
This includes protecting data, access, and ensuring employees are given training to be vigilant against threats to help limit the impact of a cybersecurity event.
Detect
How an organization monitors cybersecurity events, anomalies, and unauthorized access that may indicate a cybersecurity event is occurring.
Respond
What actions are taken when an incident is discovered, including incident response, communications, analysis, and reporting.
Recover
How normal operations and services are restored after an incident occurs. Also, taking information from lessons learned to improve overall resilience.
NIST 800-53 vs NIST 800-171 vs CSF
NIST 800-53
The primary audience for NIST 800-53 is U.S. federal agencies and federal information systems. It is also used as the baseline for programs such as FedRAMP and is widely referenced by cloud service providers and other organizations.
The 800-53 encompasses hundreds of technical, operational, and management controls across multiple fields to achieve FISMA or FedRAMP approval and requires significant resources and continuous monitoring.
NIST 800-171
The primary audience for the NIST 800-171 are defense contractors, universities, and private vendors handling Controlled Unclassified Information (CUI). Intended to be a subset of the NIST 800-53, the 800-171 framework is meant to protect CUI on non-federal systems.
If your organization does business with the Department of Defense (DoD) or handles sensitive government information, the NIST 800-171 is a contractual requirement and often requires obtaining the Cybersecurity Maturity Model Certification (CMMC).
CSF
Because the NIST CSF is primarily voluntary, the intended audience is predominantly in the private sector, public organizations, and critical infrastructure.
The CSF doesn’t define exactly how to configure your organization’s cybersecurity policies and procedures but provides a framework and structure.
How to implement the NIST framework
Implementing the NIST CSF is a continuous process designed to manage risk rather than achieve strict compliance. While there is not a strict step-by-step process to implementing NIST CSF, implementation is guided by the six core functions (Govern, Identify, Protect, Detect, Respond, and Recover), four maturity level tiers, and organization profiles.
The organization profiles are used to assess and guide progress, with the current profile representing where the organization currently stands with its cybersecurity posture, and the target profile representing the desired cybersecurity posture of the organization.
Beginning the continuous repeatable process for implementing NIST CSF starts with scoping the organizational profile to determine the current and target profiles. Once the scoping has been completed, the next steps are gathering needed information, creating the organizational profile, analyzing gaps and creating an action plan, and finally implementing the action plan and updating the profile.
NIST vs other cybersecurity frameworks
NIST differs from other industry frameworks and certifications such as ISO 27001, SOC 2, and CMMC in that it is a flexible, voluntary, risk-based cybersecurity framework focused on managing cybersecurity risk rather than enforcing compliance.
ISO 27001 is a certifiable compliance standard for Information Security Management Systems (ISMS) and requires third party audits which also involve costs for documentation, audit preparation, and certification.
SOC 2 requires an independent CPA to formally audit and issue an attestation report intended to demonstrate the effectiveness of your data security controls.
CMMC is a certification program used by the Department of Defense to validate an organization’s implementation of NIST 800-171 controls..
These frameworks are typically required based on industry, regulatory, or contractual obligations and follow a structured methodology with formal validation through audits or certification.
In contrast, NIST CSF is a flexible framework that does not require certification, allowing organizations to tailor implementation to their specific risk environment and business needs.
NIST compliance combined with Zero Trust controls offers enhanced security
NIST compliance provides a baseline for cybersecurity by establishing policies, procedures, and governance practices. However, compliance alone doesn’t prevent attacks.
Security depends on how effectively an organization can prevent, detect, and respond to threats.
Organizations can still face significant risk if policies and procedures are not consistently followed, or if access controls rely on permissions that do not adapt to changing conditions. These gaps can create opportunities for attackers to gain or maintain access.
NIST CSF emphasizes continuous risk assessment and improvement. When combined with Zero Trust principles such as continuous verification, least privilege, and dynamic access controls, organizations can reduce risk and strengthen their overall security posture beyond traditional perimeter-based defenses.
FAQs
Is NIST compliance mandatory?
NIST CSF is a voluntary framework, but compliance with NIST 800-53 and NIST 800-171 may be mandatory for organizations that work with the U.S. federal government or handle regulated data.
What is the NIST CSF used for?
The NIST Cybersecurity Framework (CSF) is used to assess your current security posture, minimize gaps in security, and help better defend against cyber threats.
How long does NIST implementation take?
The time it takes to implement NIST depends on the size of the organization, existing security maturity, and the specific NIST framework being implemented. It can take anywhere from three months to several years.
What’s the difference between NIST and CMMC?
NIST is a framework, a set of established cybersecurity guidelines, whereas CMMC is a verification process to ensure cybersecurity controls are being implemented.
What types of businesses should follow the NIST CSF?
NIST CSF is recommended for all organizations, while compliance is only mandatory in specific regulatory or contractual scenarios. The NIST CSF is widely recognized as a leading cybersecurity risk management framework for organizations seeking to manage cyber risks, build customer trust, and protect data.
ABOUT THE AUTHOR
Alex Keeling is a Special Projects IT Engineer at ThreatLocker with more than eight years of experience across systems engineering, cybersecurity, and enterprise support. His background includes infrastructure modernization and security operations, with hands‑on experience responding to phishing attacks and strengthening organizational security posture. Alex maintains a home lab and actively explores small‑form‑factor devices, including ESP32s and Raspberry Pi platforms, to deepen his understanding of system behavior, efficiency, and real‑world attack surfaces.
