This guide explains the most common mistakes businesses make when completing a CMMC Level 1 self assessment. It is written for organizations that work with the Department of Defense and need a clear understanding of how to avoid errors that can delay compliance.
CMMC Level 1 is the first tier of the Cybersecurity Maturity Model Certification and focuses on basic security practices such as access control, user authentication, and system integrity. This article outlines frequent compliance gaps and offers practical solutions supported by Castle Technology Partners.
Why Mistakes Happen During CMMC Level 1 Compliance
Many organizations assume CMMC Level 1 is simple because it covers entry level requirements. While the controls are foundational, they still require clear documentation, defined processes, and proper evidence collection. Mistakes often occur due to limited cybersecurity experience, unclear internal roles, or a misunderstanding of what the Department of Defense expects in a self assessment.
Common errors usually fall into predictable categories, and addressing them early can save time and reduce the risk of noncompliance.
CMMC COMPLIANCE Mistake #1: Incomplete Documentation
CMMC Level 1 requires businesses to show proof that each control is actively in place. The most frequent issue is missing or incomplete documentation such as:
- No written security policies
- No evidence of user access reviews
- No records of software updates or patching
- No proof that personnel received security training
Without documentation, a control is considered not implemented even if the activity occurs informally.
How Castle Helps
Castle Technology Partners guides you through the documentation process and helps create clear, audit ready evidence for each required control.
CMMC COMPLIANCE Mistake #2: Missing or Weak Access Controls
Access control is one of the largest parts of CMMC Level 1. Many businesses fail to:
- Limit access to authorized users
- Disable unused accounts
- Separate administrative accounts from standard user accounts
- Restrict access to sensitive systems
These gaps can lead to unauthorized access and failed assessments.
How Castle Helps
Castle evaluates user roles, access privileges, authentication methods, and system controls to ensure your access structure aligns with CMMC requirements.
CMMC COMPLIANCE Mistake #3: Failing to Train Personnel
CMMC requires basic cybersecurity training for all personnel. Many businesses overlook this requirement or provide informal reminders instead of structured and documented training.
Training must cover:
- Recognizing suspicious emails
- Handling sensitive information
- Reporting incidents
- Following secure practices at work sites
How Castle Helps
Castle assists with training recommendations and ensures you have proper documentation that training was delivered and understood.
CMMC COMPLIANCE Mistake #4: Weak System and Information Integrity Controls
CMMC Level 1 requires businesses to protect systems from malicious code and ensure software is updated regularly. Mistakes often include:
- Outdated antivirus tools
- No documented patching schedule
- Ignored security alerts
- Missing malware protection on certain devices
How Castle Helps
Castle provides visibility into system health, update activity, and potential threats so you can meet integrity requirements with confidence.
CMMC COMPLIANCE Mistake #5: Assuming Self Assessment Means Simple
Many businesses underestimate the work involved in a complete and accurate self assessment. Without proper guidance, they may:
- Misinterpret requirements
- Overestimate their compliance level
- Fail to recognize security gaps
- Submit incomplete or inaccurate assessments
How Castle Helps
Castle leads organizations through a structured review to ensure every control is evaluated and properly documented before submission.
Next Step
Schedule your CMMC Level 1 Assessment with Castle Technology Partners to avoid common mistakes and ensure your organization meets federal compliance requirements.
