What evidence do auditors commonly ask for on AC.L2-3.1.18 Mobile Device Connection?

Mobile device policy and approved device inventory; Mobile device management enrolment and compliance records; Configuration restricting connection to managed devices.

What is the most common gap auditors find on AC.L2-3.1.18?

Personal devices connect without enrolment

CMMC 2.0 · Access Control

`AC.L2-3.1.18` Mobile Device Connection

Control which mobile devices may connect to organizational systems, and manage those connections.

Source: CMMC 2.0, AC.L2-3.1.18. The statement above is our statement of the clause, read from the published text and cited so you can check it against the official text, not the instrument verbatim. Open CMMC 2.0 in the compliance library.

artefacts

held by a system

at each review

easy

to go live

Endpoint management (MDM / EDR)

where the evidence lives

teal = a system already holds it · olive = produced at each review. To go live: easy when half or more of the artefacts are already held by a system, moderate from a quarter to a half, hard below a quarter.

These are the artefacts auditors commonly ask for on this requirement, our guidance rather than text from the standard. Your assessor decides what is sufficient in your context, and asks for samples across the period when a report covers one.

system holds itEvidence a system already holds

Mobile device policy and approved device inventory · Endpoint management (MDM / EDR)
Mobile device management enrolment and compliance records · Endpoint management (MDM / EDR)
Configuration restricting connection to managed devices · Endpoint management (MDM / EDR)

periodic reviewEvidence produced at each review

none for this control

governing documentDocuments that govern the control

none for this control

First move

Automate the pull from your Endpoint management (MDM / EDR). Device compliance report from the MDM (encryption, EDR agent, OS version) on a daily pull.

Common gaps auditors find

Personal devices connect without enrolment
Inventory maintained but connection not technically restricted
No removal process when a device is lost or retired

Do this for your whole sheet

Paste the rows you run your controls from and get this mapping for every control at once, with the periodic-review ones flagged and a first move per row. No account for the first run.

Build my evidence sheet

AC.L2-3.1.17 Wireless Access Protection · AC.L2-3.1.19 Encrypt CUI on Mobile