Cybersecurity Maturity Models Explained

A company can have security policies, tools, and training in place and still struggle to manage cyber risk consistently. Perhaps backups are tested only after an incident, access reviews happen irregularly, or security responsibilities are unclear. These gaps are difficult to fix without first understanding how security work is performed today.

Cybersecurity maturity models provide a structured way to assess that work and plan improvements. They can help organizations move from informal, reactive practices toward consistent, measured processes. But models differ in purpose: some describe organizational capability, some help prioritize safeguards, and others provide a broader risk-management or compliance framework.

This guide explains what maturity means, compares commonly used approaches, and offers practical criteria for choosing one. The goal is not to achieve the highest score. It is to build security practices that are appropriate to your organization’s risks and that you can sustain.

What is a cybersecurity maturity model?

A cybersecurity maturity model is a structured way to describe how consistently an organization performs security activities and how well it improves them over time. A model typically defines areas to assess—such as access control, incident response, or risk management—and levels or criteria that help describe current capability.

Many models use a progression that resembles this:

1. Ad hoc: Work is informal, reactive, or dependent on individual effort.

2. Repeatable: Some practices recur, but they may not be consistent across teams.

3. Defined: Policies and processes are documented and applied more consistently.

4. Managed: The organization measures performance and uses results to guide oversight.

5. Optimizing: It regularly learns from outcomes and adapts its practices.

These labels are illustrative, not universal. Models may use different names, numbers of levels, assessment methods, and definitions. A level in one model should not automatically be treated as equivalent to the same-numbered level in another.

Maturity is also not the same as security effectiveness. A documented process may be mature in a procedural sense but still fail to address a significant threat. Assessment should consider both how reliably work is done and whether it reduces relevant risk.

Maturity model, framework, standard, or checklist?

These terms are related but not interchangeable:

• Maturity model: Describes stages or capabilities and helps identify where practices could improve.
• Cybersecurity framework: Organizes security outcomes or functions to support planning and communication. It may not prescribe a fixed maturity score.
• Standard: Sets requirements or recommendations. Some standards support formal assessment or certification; others are guidance.
• Control set or checklist: Lists safeguards to implement or verify, often with prioritization guidance.

An organization can use more than one. For example, a framework can organize a risk program, a control set can help prioritize technical safeguards, and a maturity assessment can track how consistently those safeguards are managed.

Approaches to compare

The best-known approaches serve different purposes. Before selecting one, check the current version and documentation: models can change, and assessment details matter.

NIST Cybersecurity Framework (CSF)

The NIST CSF organizes cybersecurity outcomes into functions, categories, and subcategories. CSF 2.0 includes six functions: Govern, Identify, Protect, Detect, Respond, and Recover. Organizations can use its outcomes to understand their current security posture, describe a target posture, and identify gaps.

The CSF also describes Implementation Tiers: Partial, Risk Informed, Repeatable, and Adaptive. These tiers characterize aspects of cybersecurity risk governance and management. They are not simply four universal maturity grades, and NIST does not require every organization to reach the highest tier. Profiles—collections of outcomes selected for an organization’s context—are central to tailoring its use.

Useful when: You need a flexible structure for discussing risk and setting a current and target state across an organization.

Tradeoff: The CSF is broad. Teams need to decide which outcomes apply, what evidence supports their assessment, and how to translate gaps into specific work.

CIS Critical Security Controls and Implementation Groups

The CIS Critical Security Controls provide prioritized safeguards intended to help reduce common cybersecurity risks. Their Implementation Groups (IG1, IG2, and IG3) help organizations select a starting set based on factors such as resources, risk profile, and operational context. IG1 is described as essential cyber hygiene; higher groups add safeguards for organizations with greater needs and resources.

These groups are not maturity levels. They are a prioritization approach for selecting safeguards. An organization can use the Controls to make concrete implementation plans, then use another framework or internal assessment to track process maturity.

Useful when: You want a practical, prioritized set of defensive actions, especially as a starting point for smaller or resource-constrained teams.

Tradeoff: A safeguard list does not, by itself, explain how well security governance, ownership, or continuous improvement works. Tailor safeguards to your environment rather than treating a checklist as proof of security.

C2M2

The U.S. Department of Energy’s Cybersecurity Capability Maturity Model (C2M2) is designed to help organizations assess and improve cybersecurity capabilities. It organizes practices into domains and uses maturity indicator levels to describe capability. C2M2 was developed with the energy sector in mind, though its concepts may be informative to other organizations.

Useful when: You need a capability-focused assessment with structured practices and maturity indicators, particularly in a relevant critical-infrastructure context.

Tradeoff: Its domain structure and assessment effort may be more than a small organization needs. Confirm that its scope and current version fit your organization before adopting it.

ISO/IEC 27001 and related guidance

ISO/IEC 27001 specifies requirements for establishing, implementing, maintaining, and continually improving an information security management system (ISMS). Organizations can seek certification through an appropriate certification process. The standard is not itself a step-by-step maturity model, although an organization can assess how developed its ISMS processes are using a separate maturity approach.

Useful when: You need a formal management-system approach and have business, customer, or regulatory reasons to pursue alignment or certification.

Tradeoff: Implementing and maintaining an ISMS takes planning and ongoing effort. Certification does not mean that all cyber risk is eliminated or that every security control is equally effective.

COBIT and capability assessments

COBIT is a governance and management framework for enterprise information and technology. It includes capability assessment concepts that organizations can use to evaluate processes. It is broader than cybersecurity alone, so it may be relevant when security needs to fit into organization-wide technology governance.

Useful when: Security leaders need to connect security and technology objectives with enterprise governance and accountability.

Tradeoff: Its breadth can make it unnecessarily complex if the immediate need is a focused security baseline.

How to choose an appropriate approach

The right choice depends on what decision you need the assessment to support. Consider these questions before committing:

1. What problem are you trying to solve? Are you identifying security gaps, prioritizing safeguards, improving governance, preparing for customer reviews, or tracking a long-term program? Choose a model that supports that decision.

2. What risks and obligations apply? Consider the data you handle, systems you operate, likely threats, legal or contractual obligations, and dependencies on suppliers. A model should help address your actual context—not just produce a score.

3. How much capacity do you have? Account for staff time, evidence gathering, technical expertise, and the work needed to maintain the assessment. A focused approach that is used consistently may be more valuable than a comprehensive one that is abandoned.

4. Who needs to use the results? Leaders may need a concise view of risk and investment priorities; technical teams may need specific safeguards and owners. Make sure the model can communicate with both groups.

5. Can you show evidence? Decide what counts as evidence before rating a practice. Evidence might include an approved policy, a completed access review, a tested restore, or records showing that alerts are investigated. Avoid equating a written policy with a working process.

6. Can you connect findings to action? A useful assessment should produce owners, priorities, deadlines, and measures—not just a maturity rating.

A smaller organization might begin with a prioritized control set and a limited scope, such as identity, endpoint protection, backups, and incident response. A larger or more regulated organization might map business objectives and risk to a framework, then use an ISMS standard or capability model to support governance and assurance. These are examples, not rules; size alone does not determine which approach is appropriate.

A practical maturity assessment process

Use the model as a planning tool, not a one-time grading exercise.

1. Define the scope

Specify the business units, systems, locations, data, and third parties included. A narrow scope can make a first assessment manageable, but state what is excluded. Do not present a partial assessment as a complete view of the organization.

2. Select the model and define rating rules

Choose an approach based on the questions above. Write down what each rating means in your assessment. For example, distinguish a process that exists on paper from one that is assigned, followed, measured, and improved. This reduces inconsistent scoring between teams.

3. Gather evidence and involve the people doing the work

Review relevant policies and records, inspect technical configurations where appropriate, and interview process owners. Include the teams that operate security controls, such as IT, engineering, legal, human resources, and business continuity. Keep evidence appropriate to its sensitivity and access it only as needed.

4. Rate current practices and record uncertainty

Assess each applicable area against the model’s criteria. Note the evidence, gaps, assumptions, and confidence behind each rating. If evidence is missing, record that uncertainty instead of assuming the process works. Use the model’s own assessment guidance where available.

5. Prioritize gaps by risk and feasibility

A low maturity rating does not automatically make an item the top priority. Consider potential impact, likelihood, exposure, dependencies, legal or contractual requirements, and the effort needed to improve. Address urgent risks promptly even if they fall outside the assessment’s usual improvement cycle.

6. Create a target state and assign owners

Set realistic targets for the areas that matter most. For each action, identify an accountable owner, due date, required resources, and a way to verify completion. A target should reflect the risk and business context, not an arbitrary goal to reach the model’s highest level.

7. Review progress and reassess

Track whether planned changes were implemented and whether they work. Revisit the assessment when the organization’s systems, threats, obligations, or business priorities change, and on a regular schedule appropriate to your program. Use incidents, exercises, audits, and operational feedback to refine the plan.

Example: improving backup maturity

Imagine an organization has backups, but no one knows whether critical systems can be restored. A maturity assessment might find that backup jobs run, while restore procedures are undocumented and recovery tests are irregular.

Instead of simply aiming for a higher score, the organization could:

• Identify critical systems and set recovery objectives with business owners.
• Assign an owner for backup monitoring and restore testing.
• Protect backup access with appropriate access controls and separate credentials where feasible.
• Test restores in a controlled environment and record the outcome.
• Track failures, investigate causes, and update procedures.

This example illustrates the difference between having a safeguard and operating it reliably. The right technical design depends on the organization’s architecture and risks; a maturity rating alone does not determine it.

Common mistakes to avoid

• Treating the score as the goal: A high rating is not proof that the organization is secure. Use findings to reduce meaningful risk.
• Confusing levels across models: Similar labels can mean different things. Do not compare scores without understanding each model’s scope and criteria.
• Scoring without evidence: Self-assessments are useful, but unsupported ratings can hide gaps. Record what was reviewed and where confidence is limited.
• Trying to implement everything at once: Too many parallel initiatives can overwhelm teams. Prioritize based on risk, dependencies, and available resources.
• Treating compliance as complete security: Meeting a standard or customer requirement can support security, but it does not address every threat or guarantee a specific outcome.
• Ignoring people and process: Tools matter, but clear ownership, training, escalation paths, and repeatable procedures are also essential security best practices.

FAQ

Are cybersecurity maturity models only for large organizations?

No. Organizations of different sizes can use maturity concepts. Smaller teams may benefit from a narrow scope and a simple, prioritized approach, while larger organizations may need more detailed governance and evidence. Choose an assessment effort that the team can maintain.

Is a higher maturity level always better?

Not necessarily. More formal processes can require additional time and resources, and the highest level may not be justified for every activity. Select targets based on risk, business needs, and the ability to operate the process consistently.

Is the NIST CSF a maturity model?

The NIST CSF is a cybersecurity framework. Its Implementation Tiers characterize aspects of risk governance and management, but they are not intended as universal maturity grades. Organizations can use CSF Profiles to describe current and target outcomes.

How often should an organization reassess?

There is no single schedule that fits every organization. Reassess regularly and when significant changes occur, such as a major system change, acquisition, new business requirement, or incident. The interval should match the pace of change and the importance of the assessed risks.

Can a maturity assessment prove that an organization is secure?

No. An assessment provides a structured view of selected practices and evidence within a defined scope. It cannot prove that every threat has been addressed or that an incident will not occur. Use it alongside risk management, technical testing, monitoring, and ongoing operational review.

Conclusion

Cybersecurity maturity models help organizations describe how security practices work today and plan improvements over time. The NIST CSF, CIS Controls, C2M2, ISO/IEC 27001, and COBIT offer different ways to organize, prioritize, or assess security work; none is a universal fit for every organization.

Start with the decision you need to make, choose an approach that suits your risks and resources, and define clear evidence and ownership. Then focus on a manageable set of improvements and verify that they work. The most useful measure of maturity is not a score—it is whether your security practices are appropriate, repeatable, and improving as your organization changes.