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Control Acronym




CMMC Level


800-171 Control #


CMMC Description

Supervise the maintenance activities of personnel without required access authorization.

CMMC Clarification

You must supervise everyone who performs maintenance activities. Sometimes a person without proper permissions has to perform maintenance on your machines. Give that individual a logon that is active only once or for a very limited time, to limit system access. Example You are in charge of IT operations for your company. One of your software providers has to come on-site to update the software on your company’s machines. You give the individual a temporary logon and password that expires in 12 hours. This gives him access long enough to perform the update. When he is on site, you remain with him. You supervise his activities. This ensures that he performs only the maintenance activities you directed.

800-171 Description

Supervise the maintenance activities of maintenance personnel without required access authorization.

800-171 Discussion

This requirement applies to individuals who are performing hardware or software maintenance on organizational systems, while 3.10.1 addresses physical access for individuals whose maintenance duties place them within the physical protection perimeter of the systems (e.g., custodial staff, physical plant maintenance personnel). Individuals not previously identified as authorized maintenance personnel, such as information technology manufacturers, vendors, consultants, and systems integrators, may require privileged access to organizational systems, for example, when required to conduct maintenance activities with little or no notice. Organizations may choose to issue temporary credentials to these individuals based on organizational risk assessments. Temporary credentials may be for one-time use or for very limited time periods.

Other Source Discussion


CIS Control References

NIST 800-53 Control Ref.

NIST SP 800-53 Rev 4 MA-5

CMMC Derived

NIST CSF Control References

NIST 800-171 References

NIST SP 800-171 Rev 1 3.7.6

Applicable FAR Clause

NIST CSF Control Reference

CERT RMM Reference


Modification of NIST 800-171B Reference

NIST 800-171B Reference

UK NCSCCyber Reference

AS ACSC Reference


Assessment Sub-Criteria 1

MA.2.114.[a] maintenance personnel without required access authorization are supervised during maintenance activities.

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