Cybersecurity Basics: Protecting CUI for Federal Contracts

Introduction to NIST 800-171 and Controlled Unclassified Information protection.

intermediate8 min readStep-by-step guide

Source & Authority Information

Information as of: January 2026
Author: GovContractFinder Team
Additional sources:

Understanding Controlled Unclassified Information

NIST Special Publication 800-171 Requirements

  • Access Control: Limit system access to authorized users and restrict what those users can do based on their roles and responsibilities. Implement multifactor authentication for privileged accounts and remote access.
  • Awareness and Training: Ensure personnel understand their security responsibilities and can recognize and respond to security threats. Provide regular training on policies and procedures.
  • Audit and Accountability: Create and maintain audit logs that enable tracking of user activities and system events. Protect audit information from unauthorized access and modification.
  • Configuration Management: Establish and maintain secure baseline configurations for systems and components. Control and document changes to configurations.
  • Identification and Authentication: Verify the identity of users, processes, and devices before granting access. Use strong authentication mechanisms appropriate to risk levels.
  • Incident Response: Establish procedures for detecting, reporting, and responding to security incidents. Test incident response capabilities periodically.
  • Maintenance: Perform regular maintenance on systems while protecting CUI. Control tools used for maintenance and ensure maintenance personnel are authorized.
  • Media Protection: Protect physical and digital media containing CUI throughout its lifecycle including storage, transport, and disposal.
  • Personnel Security: Screen individuals before granting access to systems containing CUI. Ensure departing personnel no longer have access.
  • Physical Protection: Limit physical access to systems and equipment to authorized individuals. Protect facilities and equipment from environmental hazards.
  • Risk Assessment: Periodically assess risks to organizational operations, assets, and individuals from operating systems containing CUI.
  • Security Assessment: Periodically assess security controls to determine effectiveness. Develop and implement remediation plans for identified deficiencies.
  • System and Communications Protection: Monitor and control communications at system boundaries. Implement cryptographic mechanisms to protect CUI during transmission.
  • System and Information Integrity: Identify, report, and correct system flaws in a timely manner. Protect systems against malicious code.

DFARS Clause 252.204-7012

Cybersecurity Maturity Model Certification

  1. 1
    Determine applicable CMMC level

    Review current and target contracts to identify required CMMC levels. Level determination depends on information sensitivity and contract criticality. Most contracts involving CUI will require Level 2 certification.

  2. 2
    Conduct gap assessment

    Evaluate current security posture against applicable CMMC practices. Identify gaps between current implementation and required controls. Document findings and prioritize remediation based on risk and timeline.

  3. 3
    Develop and implement remediation plan

    Create detailed plans addressing identified gaps with specific actions, responsibilities, timelines, and resources. Implement remediation systematically, documenting evidence of control implementation.

  4. 4
    Prepare System Security Plan

    Document your security implementation in a comprehensive System Security Plan describing how each required control is implemented in your environment. The SSP is essential documentation for assessment.

  5. 5
    Conduct internal assessment

    Perform self-assessment against CMMC practices to verify remediation effectiveness and readiness for external assessment. Identify and address any remaining gaps before scheduling third-party assessment.

  6. 6
    Schedule and complete certification assessment

    Engage a CMMC Third Party Assessor Organization for Level 2 certification or prepare for government-led assessment for Level 3. Maintain evidence supporting control implementation throughout assessment process.

Implementing Security Controls Practically

Documentation and Evidence Requirements

Supply Chain Considerations