A plan of action and milestones, or POA&M, documents planned remediation for weaknesses found in control assessments, so they can be corrected and known vulnerabilities reduced. NIST 800-53 control CA-5 requires one and requires updates after assessments, audits and continuous monitoring. Each entry needs an owner, a fix plan and dates.
What CA-5 says
The Rev. 5 text asks the organization to develop a plan of action and milestones for the system to document planned remediation actions to correct weaknesses or deficiencies noted during control assessments and to reduce or eliminate known vulnerabilities. It must be updated, on a defined basis, from the findings of control assessments, independent audits or reviews and continuous monitoring.
The discussion says POA&Ms are useful to any type of organization, are required in authorization packages and are subject to federal reporting requirements set by OMB. CA-5 is in the low, moderate and high baselines.
A field list that works
NIST does not prescribe columns in the control text, so these are practical fields:
- Identifier. Why: Stable reference used in tickets and reports
- Weakness description. Why: What is wrong, in plain words
- Source. Why: Assessment, audit or monitoring finding that raised it
- Affected control. Why: Links to the control that is not fully met
- Affected components. Why: Which systems, so scope is clear
- Owner. Why: One named person
- Planned fix. Why: Specific actions, not "improve"
- Milestones with dates. Why: Intermediate steps and a completion target
- Interim risk reduction. Why: What limits harm until the fix lands
- Status and last update. Why: Prevents silent staleness
Rules of thumb
Write fixes you can complete. A POA&M full of vague items that never close will not impress an authorizing official or an assessor.
Do not use it to park everything. Some programs limit what may stay open. For CMMC the rules are specific, and our post on them is CMMC POA&M rules. Check your own program's rules before you list an item.
Keep closed items for the retention period, with evidence of closure.
Link it to monitoring
CA-5 expects updates from continuous monitoring, so connect it to CA-7 data. A vulnerability that passes its remediation deadline should create or update an entry automatically, or someone should check weekly.
Review cadence
Hold a short review on a set rhythm. For each item ask: did a milestone slip, did risk change, can it close? Record the answers.
Quick check
Is a POA&M the same as a risk acceptance?
No. A POA&M tracks planned remediation. A risk acceptance is a separate decision to live with a risk, with an approver and a review date.
Where do POA&M entries come from?
From control assessments, independent audits or reviews and continuous monitoring, per CA-5.
Safeguard's compliance and evidence automation and vulnerability scanning can feed entries and keep closure evidence. A free scan is at gold.safeguard.sh/scan.
Sources
- NIST SP 800-53 Rev. 5 catalog and baseline profiles, CA-5 (OSCAL content)
- NIST SP 800-53 Rev. 5 page
Last reviewed: 19 October 2026.
