C2M2 v2.1 — Cybersecurity Capability Maturity Model

Overview

C2M2 v2.1(Cybersecurity Capability Maturity Model) is a cybersecurity maturityassessment framework that enables organizations to evaluate andimprove their cybersecurity capabilities across multiple operationaldomains. The model provides a structured approach for identifyingstrengths and gaps in cybersecurity practices, supporting continuousimprovement and risk management.

Developed andpublished by the U.S. Department of Energy, C2M2 is aimed at criticalinfrastructure sectors, such as energy, but is broadly applicable toorganizations seeking to enhance their cybersecurity posture. Themodel covers key areas including risk management, incident response,asset and information management, and supply chain security, and cancomplement other standards like NIST Cybersecurity Framework or ISO27001.

Organizationsimplement C2M2 by using the model’s assessment tools to conductself-evaluations against defined maturity indicators, prioritizeinitiatives, and track progress over time. The framework helpsintegrate cybersecurity maturity into enterprise risk management,informs compliance programs, and supports alignment with industrysecurity best practices.

Why it Matters

C2M2 v2.1provides a structured approach for organizations to assess andadvance their cybersecurity maturity across critical operationaldomains.

Key benefitsinclude:

•  Strengthen cybersecurity governance

Establishconsistent practices for oversight and accountability acrossoperational areas, improving decision-making at all organizationallevels.

•  Improve risk management effectiveness

Supportidentification and prioritization of cybersecurity risks, enablingtargeted risk reduction initiatives and better resource allocation.

•  Enhance supply chain security

Addressthird-party risks by assessing and improving vendor and supply chaincybersecurity practices aligned with industry benchmarks.

•  Support regulatory and audit readiness

Align internalcontrols with industry standards, simplifying compliance efforts andpreparing organizations for regulatory reviews or audits.

•  Promote continuous improvement

Facilitateregular self-assessments and benchmarking, ensuring ongoingadvancement and adaptation of cybersecurity capabilities over time.

How it Works

C2M2 v2.1structures cybersecurity into capability domains and maturityindicator levels that collectively form a maturity model for energyand utilities organizations. The framework outlines domain-specificpractices and objectives, aligns those practices with risk managementprocesses, and maps security controls and governance activities toprogressively higher maturity tiers.

Organizationsapply C2M2 v2.1 by conducting baseline assessments, scoring maturityacross domains, and performing gap analyses to prioritize securitycontrols and remediation. Teams integrate results into governance andcompliance programs, use the model to guide resource allocation andcontinuous monitoring, and tie improvements to incident response andregulatory reporting to strengthen overall security practices.

WithinSmartSuite, C2M2 v2.1 is operationalized by importing controllibraries, maintaining a centralized risk register, and governingpolicies against maturity targets. SmartSuite supports evidencecollection, compliance tracking, and automated remediation workflows,while dashboards and audit-ready reports enable continuousmonitoring, executive oversight, and measurable progress towardhigher maturity levels.

Key Elements

•  Domain Structure

Organizescybersecurity activities into distinct operational domains such asasset management, risk assessment, and supply chain.

•  Maturity Indicator Levels

Definesprogressive capability stages for each domain, describing activitiesfrom foundational to advanced maturity.

•  Assessment Objectives

Specifies clearcriteria for evaluating the implementation and effectiveness ofcybersecurity practices within each domain.

•  Management Practices

Describesstructured security practices that guide the establishment andimprovement of cybersecurity processes.

•  Enterprise Risk Alignment

Establishes alinkage between cybersecurity maturity and broader organizationalrisk management frameworks.

•  Self-Assessment Tools

Provides formaltools for structured evaluation and benchmarking of cybersecuritycapabilities and maturity.

Framework Scope

C2M2 v2.1supports entities managing critical infrastructure, includingutilities and organizations overseeing essential services, byassessing cybersecurity practices across operational and technicalenvironments such as information systems, operational technology, andsupply chains. It is typically implemented when improvingcybersecurity maturity, managing risk exposure, and supportingassurance programs for critical operations.

Framework Objectives

C2M2 v2.1provides a structured approach for organizations to evaluate andenhance their cybersecurity maturity and risk managementcapabilities.

•  Enable organizations to identify and address cybersecuritystrengths and gaps

•  Strengthen governance and oversight of cybersecurity practicesacross key operational domains

•  Enhance resilience to cyber threats and disruptions affectingcritical infrastructure

•  Support regulatory compliance and alignment with securitystandards and best practices

•  Improve data protection through robust security controls andrisk management processes

•  Promote continuous improvement of cybersecurity posture andaudit readiness C2M2 v2.1 assesses cybersecurity capability maturityand is commonly mapped to NIST CSF, NIST SP 800-53 and ISO/IEC 27001,with mappings to MITRE ATT&CK for threat-focused insights.Organizations use C2M2 for maturity benchmarking, regulatorycompliance, security governance, and prioritizing operationalsecurity improvements and investment decisions.

Common Framework Mappings

Organizationsmap C2M2 to complementary frameworks to align maturity assessmentswith technical controls, regulatory requirements, and threat models,enabling streamlined audits, risk management, and operationalcybersecurity improvements.

Mappedframeworks include:

CIS CriticalSecurity Controls

ISO/IEC 27001

ISO/IEC 27002

ISO/IEC 27701

MITRE ATT&CK

NISTCybersecurity Framework

NIST SP 800-171

NIST SP 800-53