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Common CMMC Mistakes: Overestimating Self-Assessment Scores in SPRS

Written by Sera Brynn | May 30, 2025 at 8:18 PM

 

Top 15 Most Common CMMC Compliance Mistakes Series #5

This article is part of our expert-led series: The Top 15 Most Common CMMC Compliance Mistakes (and How to Solve Them). Throughout this series, we're dissecting the frequent errors, misunderstandings, and misconceptions organizations encounter on their path to CMMC certification, drawing insights from seasoned CCPs, CISOs, and CCAs.

Today’s focus:  We examine the pitfalls of overestimating self-assessment scores in SPRS and the importance of accurate, validated evaluations.

What You’ll Learn

  • The role of SPRS in CMMC compliance
  • Common mistakes in self-assessment scoring
  • Consequences of inflated or inaccurate scores
  • Best practices for accurate self-assessments

Understanding SPRS and Its Role in CMMC Compliance

The Supplier Performance Risk System (SPRS) is a Department of Defense (DoD) database that collects and manages supplier performance information, including cybersecurity self-assessment scores based on NIST SP 800-171. These scores are critical for organizations seeking to do business with the DoD, as they reflect the organization's cybersecurity posture and compliance readiness.

Common Mistakes in Self-Assessment Scoring

Organizations often make the following errors when conducting self-assessments:

  • Incomplete Evaluation of Assessment Objectives: Failing to assess all 320 objectives across the 110 NIST SP 800-171 controls can result in inaccurate scoring.

  • Over-crediting Partial Implementations: Assigning full credit to controls that are only partially implemented, despite the DoD's all-or-nothing scoring approach.

  • Incorrect Use of 'Not Applicable' Status: Marking controls as 'Not Applicable' without proper justification, which is only permissible for specific controls.

  • Improper Use of Alternative Measures: Applying statuses like 'Alternative Measures' or 'Risk Acceptance' without thorough documentation and understanding of DoD requirements.

  • Inaccurate Scoping: Mis-defining the boundaries of the assessment, leading to the exclusion of relevant systems or processes.

Consequences of Inflated or Inaccurate Scores

Submitting inflated or inaccurate self-assessment scores can have severe repercussions:

  • Contractual Risks: Misrepresentation can lead to contract termination or disqualification from future opportunities.

  • Legal Implications: Deliberate misrepresentation may result in penalties under the False Claims Act, including fines and potential criminal charges.

  • Reputational Damage: Discovery of inaccuracies can harm an organization's credibility with the DoD and other partners.

  • Assessment Failures: Inaccurate self-assessments can lead to failures in subsequent third-party evaluations, delaying certification.

Best Practices for Accurate Self-Assessments

To ensure accurate and reliable self-assessment scores:

  • Comprehensively Evaluate All Controls: Assess all 320 objectives across the 110 controls, ensuring full implementation before assigning credit.

  • Avoid Over-crediting: Only assign credit to fully implemented controls; partial implementations should not receive full points.

  • Justify 'Not Applicable' Status: Only mark controls as 'Not Applicable' when they meet specific DoD criteria and provide proper documentation.

  • Properly Document Alternative Measures: If using alternative measures or risk acceptance, ensure thorough documentation and understanding of DoD requirements.

  • Accurately Define Assessment Scope: Clearly delineate the boundaries of the assessment, including all relevant systems, processes, and data flows.

  • Seek Expert Guidance: Engage with CMMC advisory professionals to validate assessments and prepare for third-party evaluations.

 

In Summary: Getting True Accuracy in Your Self-Assessments

Accurate self-assessment scores in SPRS are crucial for demonstrating CMMC compliance and maintaining eligibility for DoD contracts. By avoiding common mistakes and adhering to best practices, organizations can ensure their assessments reflect their true cybersecurity posture and readiness.

Key Takeaways

  • SPRS scores are critical indicators of cybersecurity compliance for DoD contractors.
  • Common self-assessment mistakes include incomplete evaluations, overcrediting, and inaccurate scoping.
  • Inaccurate scores can lead to contractual, legal, and reputational risks.
  • Adhering to best practices and seeking expert guidance ensures accurate and reliable assessments.


Up Next In Our Top 15 Most Common CMMC Mistakes Series:

In our next article, we'll review why a successful CMMC assessment requires months of proven compliance, and not last-minute fixes.