MA.L2-3.7.3 Equipment sanitization

MA.L2-3.7.3 asks you to make sure equipment leaving your spaces for off-site maintenance holds no CUI. This page explains the test, the evidence that passes and what meeting it costs.

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What MA.L2-3.7.3 equipment sanitization requires before off-site repair

Before a device that may hold CUI goes to a vendor for repair, a warranty swap or any other off-site maintenance, your organization must ensure that the equipment is sanitized of any CUI. That is the whole of MA.L2-3.7.3. The requirement is worth 1 point under the CMMC scoring methodology, yet it is a common finding because the assessment objective in NIST SP 800-171A is narrow and easy to fail in practice. An assessor checks one thing: whether equipment removed from organizational spaces for off-site maintenance is sanitized of any CUI. There is no partial credit for a policy that says the step should happen. The organization owns this control and the outcome. An implementation partner or consultant can help you design the process and collect records, but only the independent assessor decides whether the requirement is met.

Several things make this hard. Staff often do not know where CUI sits on a laptop, workstation, printer or storage array, especially when it has been copied into temporary folders, caches, backups or synced cloud clients. Drives fail, so a wipe command may not complete and the device may not be readable at all. Vendors frequently return equipment unchanged or with the original data intact, and some warranty processes replace a unit before anyone has checked what it contained. Each of these gaps can make the single objective unmet. Before you ship anything, confirm with your maintenance vendors which sanitization method they accept, whether they will return media or destroy it, and who signs for each item.

Plan the decision around the equipment, not the ticket. Identify which assets are likely to store CUI, choose clearing, purging or destruction for each class of media, and decide what happens when a drive cannot be sanitized (usually removal and retention or destruction on site). Keep a record for each item showing what was removed, the method used, who performed it, the date and the vendor. Assessors look for sanitization records and maintenance records as evidence, along with tests of the sanitization process itself. For the full method list and evidence expectations, see the CMMC Assessment Guide Level 2.

Which equipment and teams fall under equipment sanitization scope

Scope for MA.L2-3.7.3 follows the system security plan and the CUI boundary, not the asset register alone. The cards below cover the decisions that determine which equipment must be sanitized before it leaves organizational spaces, and which teams touch that equipment along the way. Confirm each device class against your own environment before you write the procedure.

Equipment that stores or processes CUI

Workstations, servers, laptops, and storage arrays that hold or process CUI are in scope when they leave organizational spaces for off-site maintenance. Network devices are in scope when their configuration files contain CUI, such as system details or security settings tied to the CUI environment. Check the system security plan for each device class and record which ones hold CUI at rest, in memory, or in configuration.

Printers, copiers, and test rigs

Multifunction printers and copiers with internal storage can retain scanned or printed CUI, and test rigs with attached drives or logs can hold CUI from test runs. These devices are often missed because they are managed by facilities or engineering rather than IT. Ask each owner whether the device has storage that persists after power-off and whether it has been in contact with CUI.

Equipment that never held CUI

Equipment that has never stored, processed, or transmitted CUI may leave for maintenance without the sanitization step, but the decision must be documented and supported by evidence. Confirm the device's history against asset records and the boundary diagram. A device that was briefly connected to a CUI network, shared a drive, or was reimaged onto a CUI system falls back into scope.

Warranty and vendor return flows

Warranty replacements and vendor returns are the most common way CUI-bearing media leaves the building without a sanitization step. The return process should flag any device with a storage component before shipment, and the RMA paperwork should not be the only record of what left. Ask vendors whether they will return drives that failed diagnostics, and plan for how failed drives will be destroyed rather than returned.

Leased and shared equipment

Leased equipment and devices shared between projects or business units may carry CUI from a previous user or contract. Leasing agreements often assign data return responsibilities to the lessee, and shared equipment can move between CUI and non-CUI systems without a clear record. Confirm ownership, lease return terms, and the chain of custody for each shared device before it is scheduled for off-site work.

Teams that touch the equipment

IT staff, facilities, procurement, and the external maintenance vendor each handle equipment at a different point in its life. Procurement sets return terms, facilities manages physical removal, and the maintenance vendor may receive the device before any sanitization is complete. Assign one owner for the sanitization step, define handoffs in writing, and confirm that each team knows which device classes require sanitization before they move.

How an assessor tests equipment sanitization

This table compares the assessor's test approach, the evidence requested and the findings that most often fail for MA.L2-3.7.3. Read each row as a question the assessor will ask, then check that your records answer it in final form. The main takeaway is that a single assessment objective is judged on proof that every piece of equipment leaving for off-site maintenance was actually sanitized.

Assessor activityWhat the assessor doesEvidence requested or common finding
Interview maintenance and asset staffAsks who decides whether equipment leaves for off-site repair, who clears it and how the decision is recordedStaff describe a different process than the written procedure; no named owner for sanitization before shipment
Examine sanitization and maintenance recordsReviews logs for equipment removed for off-site maintenance and matches each entry to a sanitization recordMissing records for some devices; no record links a sanitization event to the specific asset that left the site
Examine vendor maintenance specificationsChecks whether vendor terms or service agreements describe media handling and who sanitizes before pickupVendor paperwork is silent on sanitization, and the organization has not documented its own step
Test the sanitization process on a sample deviceSelects a device, runs the documented method (clearing, purging or destruction) and checks that CUI cannot be recoveredNo proof the method was applied; the procedure names a method that the team cannot reproduce on the sample
Check that records are in final formConfirms that sanitization records are completed, signed or approved and not left as drafts or open ticketsDraft or unsigned records, or entries that were never closed after the device was released
Trace released devices to a checkStarts from the list of devices sent off site and looks for a documented pre-release check for each oneDevices released without a check, especially loaner, warranty or failed units returned in a hurry

Clearing, purging or destroying: choosing a method for each device

Clearing overwrites storage with data, typically a fixed pattern, so that the original CUI cannot be read back through normal operating system or application access. It is the lightest method and usually fits devices that stay within a controlled environment, such as a workstation returned to a vendor under a contract that keeps the drive in your custody, or a device that will be reused internally after maintenance. The key question is whether the overwrite reaches every location where CUI could sit.

  • Where it fits: Magnetic hard drives and some removable media where the controller writes directly to addressable sectors and the device is staying in a controlled chain of custody.
  • What it leaves behind: A device with its storage intact but its readable content replaced. Remnants can persist in areas the operating system cannot address, such as spare or remapped sectors.
  • What the record should show: The device identifier, the tool and version, the pattern and number of passes, the operator, the start and end times, and the verification result.
  • Where it fails: Overwrites do not reliably reach remapped blocks or wear-leveled flash cells in solid-state drives, and some drives cannot be verified by a read-back from the host.
  • Confirm with the vendor: Whether the drive's firmware supports a documented block-level erase and whether the tool can report which areas were covered.

Before you choose clearing for any device, confirm with the manufacturer that the overwrite method is documented for that exact model and that the record can show it completed.

How to implement equipment sanitization before off-site maintenance

This sequence turns MA.L2-3.7.3 into a repeatable routine: find every device that may hold CUI, stop it from leaving until it is checked, sanitize it, record the result, and close the loop when it returns. Each step ends with a document or check an assessor can examine.

  1. Identify equipment that holds or may hold CUI

    Start from your system inventory and list every device that stores, processes or can reach CUI, including laptops, workstations, servers, storage arrays, network gear with local configuration, printers with memory, and removable media. Use an asset register such as the GLPI Assets module or Wazuh system inventory data to confirm what exists and where it is stored. The output is a scoped asset list that marks each item as CUI-bearing, possibly CUI-bearing, or out of scope, with the owner named for each entry.

  2. Set a hold rule for removals

    Write a rule that no CUI-bearing or possibly CUI-bearing device leaves an organizational space for off-site maintenance until a sanitization check is complete. Communicate the rule to facilities, IT staff and anyone who ships hardware, and make the maintenance request form ask whether the device has been through the check. The output is a written hold procedure, approved by the control owner, that applies to warranty swaps, vendor repairs and leased equipment returns.

  3. Select a sanitization method per media type

    Match each media type to a method your assessor will accept: clearing (such as overwriting with a fixed pattern), purging (such as degaussing or a secure erase command) or destroying (such as shredding or incineration). Confirm with the vendor and your own environment that the chosen method works on the specific drive technology, especially solid-state storage, where overwriting may not reach every cell. The output is a method matrix by media type, with the tool, command or service used for each.

  4. Sanitize and verify the result

    Run the selected method under a named technician, and verify it with a check that proves the media no longer holds CUI, such as a read-back test, a blank-sector sample or a tool report. Where the device cannot be sanitized reliably, route it to destruction instead of release. The output is a verification result for each device, with a failed check stopping the removal and sending the item back to the hold queue.

  5. Record the sanitization with identifier, person and date

    Create a sanitization record for each device that states its asset identifier and serial number, the media type, the method and tool used, the verification result, the name of the person who performed the work, and the date. Store the record with your maintenance records so it can be produced at assessment. The output is a signed or approved sanitization record in final form, since a draft does not show that the requirement is met.

  6. Approve the removal and hand over to the vendor

    Only after the sanitization record exists, issue an approved removal ticket that names the device, the destination vendor, the reason for maintenance and the expected return date. Hand the device to the vendor with that ticket and a copy of the record, and keep the chain of custody documented from the room to the courier. The output is an approved removal ticket linked to the sanitization record, and no device leaves without both.

  7. Reconcile the returned equipment

    When the device comes back, match it against the removal ticket by serial number and check that the device arrived unchanged in identity, that the vendor's work is documented, and that the asset register reflects its status. Confirm whether the vendor retained any media or replaced components, and treat any unexplained difference as an incident to investigate. The output is a return-receipt check closed in the ticket system and an updated asset record, so the device can rejoin the scoped inventory.

Evidence that passes equipment sanitization and how to keep it current

SP 800-171A points assessors toward a small set of records for MA.L2-3.7.3: sanitization records, maintenance records, vendor specifications, removal approvals and custody records. Each card below covers one artifact, and together they show that every piece of equipment leaving the site was cleared of CUI before the work started.

Sanitization records per device

Each record should name the device and its asset tag or serial number, the sanitization method (clearing, purging or destruction), the tool and its version, the operator, the date, and the verification result. Assessors look for a record that matches each piece of equipment that left the site, so a generic log entry for a batch rarely passes. Check that the device identifier matches the asset inventory exactly.

Method selection by media type

The assessment guide describes clearing by overwriting with a fixed pattern, purging with degaussing or secure erase, and destruction by shredding or incinerating. The record should show which method applied to which media type, such as a spinning disk versus a flash device, and why. Confirm with the media vendor that the chosen method is suitable for the specific hardware.

Maintenance records

SP 800-171A lists maintenance records as potential evidence for 3.7.3. These should show the reason the equipment left the site, the vendor or technician involved, the work performed, and the date it was sent and returned. Link each entry to the sanitization record for the same device so an assessor can trace the full sequence.

Vendor maintenance specifications

Vendor specifications explain how a device must be handled, including any sanitization steps the manufacturer requires before off-site service. Keep the version of each specification on file, since the procedure may change between releases. Where a vendor cannot support the sanitization required by the organization, the record should document that gap and the decision made.

Removal approval and chain of custody

A signed removal approval should exist before any equipment leaves organizational spaces. Chain of custody records track the device from the approval through transit, service, return and reintegration, with a named custodian at each handoff. Returned equipment should be checked against its original record before it reconnects to a system that handles CUI.

A single register tied to the asset inventory

Keep these records in one register keyed to the asset inventory, so each device has one current entry showing its status and linked artifacts. GLPI can hold the asset records, and Wazuh Syscollector can confirm hardware and software details on endpoints. Review the register on a fixed schedule and before any assessment, because only final, non-draft records count toward MET.

What equipment sanitization costs in money and effort

This table compares the cost components of sanitizing CUI from equipment before off-site maintenance, who is paid for each, whether it is one-time or recurring, and what drives it up or down. Use it to build a quote request and to see where open-source tools remove license spend. Figures must come from your own device counts, media types and vendor terms, not from this page.

Cost componentWho is paid or who bears itOne-time or recurringWhat drives the cost
Sanitization tooling (degaussers, secure-erase licenses, overwrite utilities)Hardware or software vendor, or the organization's own budgetMostly one-time for hardware, recurring if licensed per seat or per deviceNumber of media types, whether vendor licenses are needed, and whether tools are bought or already available
Technician time per device (clearing, purging or destroying)Internal staff or a contracted service providerRecurring, tied to each device that leaves for maintenanceDevice count, share of devices returning from vendors, and the method chosen for each media type
Destruction services (shredding or incineration)Certified destruction vendor, usually per pickup or per unitRecurringWhether destruction is contracted or done in-house, and how many failed or unreadable media go this route
Verification and sampling effortInternal staff or the service provider performing checksRecurringNumber of devices sampled, how verification is recorded, and whether results are reviewed by a second person
Sanitization record upkeepInternal compliance or IT staffRecurringVolume of devices, depth of records kept (asset ID, method, operator, date, result) and where records are stored
Asset inventory tooling (for example GLPI or Wazuh Syscollector)Open-source deployment carried by the organization or implementation partner; no license fee for the software itselfOne-time setup, recurring hosting and upkeepNumber of endpoints, integration with existing asset records, and in-house or partner administration hours
External testing or review of the processIndependent security assessor or consultant, quoted from written scopeOften one-time per cycle, sometimes recurringScope of the process reviewed, number of methods in use, and whether test results are sampled or fully reproduced
Assessor sampling time during a CMMC assessmentAssessor (C3PAO) under its own engagement terms; the organization supplies staff and evidenceRecurring per assessment cycleNumber of sanitization events the assessor samples and how quickly complete records can be produced

Open-source tools that support the asset and sanitization trail

Sanitization is only defensible when the organization can show which device held CUI, what it contained, and who approved its removal. The three tools below keep that trail in self-hosted systems, though none of them sanitizes media or proves that a wipe happened.

GLPI Assets as the device register

GLPI's Assets module (GPL-3.0-or-later) records computers, monitors, software, network equipment, peripherals, printers and racks, entered by hand or pushed automatically by the GLPI Agent through native inventory in GLPI 10 and later. Before a device leaves for off-site maintenance, the team can check its register entry to see whether it may hold CUI and which storage media it carries. Confirm in your deployment that agent-collected records include storage devices, not only the parent asset.

Wazuh Syscollector for endpoint state

Wazuh's Syscollector module (GPL-2.0-only) collects hardware, operating system, installed software, network interfaces, services and users from each endpoint and stores them in the Wazuh indexer. Security staff can use the dashboard inventory to confirm what software and accounts a device carried at the time it was pulled for service. It shows what was installed, not whether data was overwritten, so it supports the record rather than replacing the sanitization log.

Zammad tickets for removal approval

Zammad (AGPL-3.0-only) is a web-based helpdesk that places requests from email, chat, telephone and social media into one ticket system. A removal request can be opened as a ticket, linked to the asset ID, and closed only after sanitization is recorded and signed off. Configure the ticket workflow so the closure step requires the sanitization method and the approver's name, since Zammad will not enforce that on its own.

Sanitization record still comes from the process

None of these tools clears, purges or destroys media. The sanitization record must be produced by the process: the method used (clearing, purging or destruction), the device identifier, the person who performed it, and the verification step. Assessors look for this evidence under the single assessment objective for 3.7.3, so a register entry alone does not show the device was sanitized.

Confirm capabilities in your own deployment

Capabilities depend on version, agent configuration and integrations, and the team should verify each one before relying on it for a CMMC assessment. Test a sample device end to end: confirm the GLPI record, the Wazuh inventory entry and the Zammad ticket all reference the same asset identifier. Keep the test results as evidence of the control design.

Who owns equipment sanitization, who helps and where the auditor stops

Your organization owns MA.L2-3.7.3. The requirement asks that equipment removed from organizational spaces for off-site maintenance is sanitized of any CUI, and no outside party can accept that accountability on your behalf. Internal ownership covers the decisions that determine whether the control works day to day: which equipment counts as in scope, who authorizes a removal, and what happens when a device has no clear sanitization record.

  • Device register: Maintain the authoritative list of equipment that may hold CUI, including laptops, storage arrays, network gear and specialized test equipment.
  • Hold rule: Write and enforce a rule that no device leaves the facility for maintenance until sanitization is confirmed or the device is handled under a documented exception.
  • Sanitization method selection: Choose clearing, purging or destruction for each media type and document why it fits your risk and vendor requirements.
  • Records: Keep sanitization logs, vendor return forms and approvals in a form that shows the final state, not drafts.
  • Ongoing review: Check that the procedure runs as written, with periodic samples of actual removals.

Before relying on this tab, confirm that a named owner signs off on each removal and that someone outside the maintenance workflow reviews the records.

Common questions about MA.L2-3.7.3 equipment sanitization

How much effort does MA.L2-3.7.3 take to meet?

The effort is usually modest compared with other CMMC Level 2 requirements, but it depends on how many devices leave your spaces for off-site maintenance and how mature your media handling process is. The assessment has a single objective: equipment removed for off-site maintenance must be sanitized of any CUI. The work therefore concentrates on defining a sanitization step, applying it consistently, and keeping records. Drivers include the number and types of devices (laptops, servers, storage arrays, test equipment), whether sanitization is done in-house or by a vendor, and whether the process already exists in your media protection procedures. Requirement points are fixed by the scoring methodology under 32 CFR 170.24, so effort is about execution and proof, not points.

Can a small team meet this requirement without outside help?

Yes, a small team can usually meet this requirement internally if it has a written sanitization procedure, a clear owner, and a simple log of each device that leaves the premises. Outside help is most useful for drafting the procedure, testing that the chosen method works on your actual media, and preparing evidence in a form an assessor can review. An implementation partner such as DeployOpen can prepare systems, procedures and records, but the organization owns the control and only an independent assessor can judge it. Ask whether your team has the time to run the process and keep records consistently, since gaps usually appear in the paperwork rather than the technical step.

Which sanitization method does a device need?

The method depends on the media type and how sensitive the CUI on it is, not on a single rule in the requirement. The CMMC Assessment Guide Level 2 describes three families: clearing, such as overwriting with a fixed pattern; purging, such as degaussing or a secure erase command; and destroying, such as shredding or incinerating. Clearing may be enough for some magnetic drives where the device will stay with a trusted maintainer, while solid-state media and devices that will not be returned may need purge or destruction. Confirm the method against your own media inventory and your maintenance vendor's specifications, and test it on a sample device before relying on it.

What evidence will an assessor ask for under MA.L2-3.7.3?

An assessor will look for proof that sanitization happened for each device that left your spaces, and that the process works as written. NIST SP 800-171A lists maintenance records, vendor maintenance specifications, and equipment and media sanitization records as potential evidence, and it includes tests of the sanitization processes and mechanisms. Practically, expect a sanitization procedure, a sanitization or removal log linking each device to its maintenance ticket and sanitization method, vendor documentation for any third party that handled the device, and a sample test showing the method was applied. Evidence must be final, not draft, to count toward a MET result under 32 CFR 170.17 and 170.24(b).

Can a vendor's repair service handle sanitization for us?

A vendor can perform sanitization for you, but the organization remains responsible for the control, so the contract and records must show that CUI is removed before the device leaves. Ask the vendor to state the sanitization method it uses, to provide certificates or logs for each device, and to confirm whether it will destroy or return media. Also check whether the vendor will accept devices with CUI at all. If a vendor cannot document sanitization, the safer option is to sanitize in-house before shipment. Include these requirements in your maintenance agreement, and review the vendor's records as part of your own evidence set.

What happens if MA.L2-3.7.3 is on a POA&M?

Under 32 CFR 170.21, MA.L2-3.7.3 is a 1-point requirement that is not on the exclusion list, so it can be placed on a plan of action and milestones if your score is at least 88 of 110 (0.8). The plan must be closed out within 180 days. Being on a POA&M does not remove the obligation to protect CUI, and an assessor will still expect a real sanitization step in place by closeout. Confirm current status with the DoW CIO and your contracting officer, because the CMMC rollout schedule has changed and the rule text and implementation guidance should be checked before you rely on any POA&M timeline.

What does the work need from our organization?

The work needs a named owner, access to your device inventory and maintenance workflow, and time from the people who handle returns, repairs and disposals. Your team must confirm which systems hold CUI, decide which sanitization method applies to each media type, and agree who signs off on each removal. Engineers need access to test devices or a test environment, and procurement or legal should review vendor terms. Scope is usually set in writing before work starts, so list the device types, locations and maintenance vendors in scope so any quote reflects the actual workload.

How DeployOpen prepares equipment sanitization for assessment

DeployOpen helps organizations prepare the sanitization procedure, the tooling that records it and the evidence an assessor will examine for MA.L2-3.7.3 Equipment sanitization. The organization owns the control and its decisions, while DeployOpen builds and documents the supporting systems, and only an independent assessor can judge whether the requirement is met.

How we scope

  • We list the equipment types that leave organizational spaces for off-site maintenance and that may hold CUI.
  • We agree which sanitization method, clearing, purging or destruction, applies to each media type in the written scope.
  • Engagements are fixed-scope, with deliverables and timelines agreed in writing before any work begins.

How we build

  • We configure GLPI asset records so each device leaving the premises carries its owner, location and maintenance status.
  • We configure Wazuh Syscollector inventory on managed endpoints so hardware and media records can be checked against asset lists.
  • We set up Zammad ticket workflows that route each off-site maintenance request through a documented sanitization step before release.

How we hand over

  • We write the sanitization procedure, covering method selection, verification steps and sign-off roles, for the organization to adopt.
  • We deliver sanitization records templates and sample completed entries that show who sanitized what, when and how.
  • We walk the organization's staff through the evidence set so they can produce final-form records for the assessor.

How we support

  • Ongoing support, upgrades and periodic review of the procedure and records are available as a retainer.
  • We help the organization confirm its sanitization tooling and method against the assessment objectives in NIST SP 800-171A.
  • The organization should confirm with its assessor which evidence form and retention period it will accept before the assessment.

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