---
title: "NIST 800-53 Rev. 5 Compliance Software"
description: "NIST SP 800-53 Rev. 5 compliance software: Low, Moderate and High baselines as evidence in your own boundary, with the SSP, SAR and POA&M for your ATO."
url: https://policycortex.com/solutions/nist-800-53
sealed: 2026-11-09
amended: 2026-11-10
register: solutions/nist-800-53
records: 6
digest: sha3:3fea0aef8fd0e2c307b8f543e8111129e72f89f2f698883de87282a3937c5c6e
---

# NIST 800-53 compliance evidence for federal systems.

NIST SP 800-53 Rev. 5 / SP 800-37 RMF / OSCAL 1.1.2

NIST SP 800-53 Rev. 5 is the control catalog behind federal authorizations: 20 families, 1,196 controls and enhancements, and Low, Moderate and High baselines. PolicyCortex records how each control in your baseline is implemented, as evidence inside your own boundary, and generates the SSP, SAR and POA&M from that one record, regenerable to any date.

[Request Access](https://app.policycortex.com/auth?mode=request-access) · [Book a call](https://policycortex.com/book)

A person replies within one business day. Scope and onboarding are agreed with your team.

## What an 800-53 authorization asks you to prove

A federal system is authorized against a baseline: the SP 800-53 Rev. 5 controls selected for its impact level under FIPS 199 and SP 800-53B. The Risk Management Framework in SP 800-37 then asks for the same facts in a fixed set of documents. The System Security Plan says how each control is implemented. The Security Assessment Report says what the assessor found. The Plan of Action and Milestones tracks what remains. After the decision, continuous monitoring keeps those documents true.

Writing the documents once is not the hard part. Keeping them the same as the system is, and so is showing what the system was on the day the authorizing official signed.

- **nist.catalog**: NIST SP 800-53 Rev. 5, release 5.2.0: 20 families, 1,196 controls and enhancements, loaded from NIST's own OSCAL content.
- **nist.baselines**: Low (149 controls), Moderate (287) and High (370), from the SP 800-53B baseline profiles.
- **nist.package**: SSP, SAR, POA&M and evidence indexes, generated from one implementation record. Exported as OSCAL 1.1.2, with the eMASS POA&M worksheet.
- **nist.boundary**: AWS and Azure boundaries are supported for ATO packaging, with AWS GovCloud (US) and Azure Government supported.
- **nist.decision**: The authorizing official decides. PolicyCortex records each decision with the frozen package it rested on.
- **nist.ongoing**: After the decision: continuous ATO, where authorized systems are checked every hour against the official's tolerance. The continuous ATO guide covers NIST ongoing authorization and the DoD requirements.

## The evidence produced for the 800-53 baseline

Every document in the package is drawn from three records. Where each one files under SP 800-53:

- **CA-2 · CA-7**: Proof of State: control assessments and continuous monitoring grounded in point-in-time records of each control implementation, regenerable to the date an assessor or authorizing official names.
- **AU-9 · AU-10**: The exported chain: audit records whose later modification is detectable, because each digest commits to the record before it.
- **CM-3 · CM-6**: Proof of Change: configuration change control as a record of who or what altered the boundary, under what authority, with before and after state and a rollback identifier.
- **AC-6 · SI-4**: Proof of Agency: least privilege and monitoring applied to automation. What an automated action was permitted to do before it ran, and what it did.
- **PL-2 · CA-5**: The System Security Plan and the Plan of Action and Milestones, generated from the implementation record instead of written beside it.

![The PolicyCortex collection workspace for one authorization package: passing controls, control family coverage, POA&M items and package readiness from scope to assessment](https://policycortex.com/images/pcx-ato-collection-overview-1600.webp)

Exhibit SB-15 · one authorization package from scope to assessment: passing controls, control family coverage, open POA&M items and package readiness. Illustrative demo data; the interface is real.

## How an authorizing official checks the record

For an 800-53 authorization the first question a reviewer asks is whether this is the package that was assessed. Every exported package carries its evidence chain and a verifier that runs offline, with no PolicyCortex account, so the answer does not depend on trusting the vendor or the operator.

Every exported package carries the records PolicyCortex writes for this obligation in a SHA3-256 hash-chained stream, with declared gaps for any unobserved interval, so any second party can recompute it offline without our API.

**Stated limit.** PolicyCortex is not an assessor and does not certify anything. It produces the records a compliance decision rests on; the assessor, the authorizing official, or the accountable official makes the determination. What is not connected is not observed, and the record says so. Control identifiers cite NIST SP 800-53 Rev 5, NIST SP 800-171 Rev 2, PCI DSS 4.0, SOC 2 TSC, ISO/IEC 27001:2022 and 45 CFR 164 as published.

## Access and onboarding inside an authorization boundary

We agree on your boundary, baseline and impact level before onboarding. Read-only captures within that scope supply the evidence for the package. Run it in your own Azure Government or Azure commercial subscription, on your own Kubernetes cluster, or on the hosted service.

- **eval.mode**: SHADOW. Watch only; nothing executes.
- **eval.onboarding**: A person replies within one business day. Scope and onboarding are agreed with your team.
- **eval.location**: The hosted service, or a customer-operated installation delivered with our engineers. Azure, AWS, and GCP are observed clouds; AWS GovCloud (US), Azure Government, and GCC High are supported.
- **eval.egress**: In a customer-operated installation: none, with no telemetry to PolicyCortex. On the hosted service, evidence is stored in PolicyCortex's Azure tenant, in the United States.
- **eval.after**: You keep the records. Licensing is annual and the tenant owns the evidence; a delivery engagement is optional.

## Delivery, if you want the record stood up for you

Licensing does not depend on it, but a fixed-scope delivery engagement is available: thirty days, one agreed primary cloud environment, an evidence package built and defended through assessor review. The independent assessor makes the certification decision. No certification is guaranteed.

Authorization work under SP 800-53 is scoped separately from the standard CMMC Level 2 engagement.

- **engagement.scope**: Thirty days. One agreed primary cloud environment.
- **engagement.outcome**: An evidence package built and defended through assessor review.
- **engagement.limit**: The independent assessor decides. No certification is guaranteed.

[Every term of the engagement, on its own page.](https://policycortex.com/engagement)

## Questions assessors and buyers ask

**Q: What is NIST SP 800-53?**
A: NIST Special Publication 800-53 is the catalog of security and privacy controls for federal information systems. Release 5.2.0 of Revision 5 lists 1,196 controls and enhancements in 20 families, and SP 800-53B defines the Low, Moderate and High baselines agencies select by impact level.

**Q: How is NIST 800-53 different from NIST 800-171?**
A: SP 800-53 applies to federal systems and is the basis of their Authorization to Operate. SP 800-171 applies to nonfederal systems that handle Controlled Unclassified Information and is derived from the 800-53 Moderate baseline; CMMC Level 2 assesses it. PolicyCortex keeps one implementation record and projects it into both.

**Q: Does PolicyCortex collect evidence for every 800-53 control?**
A: The catalog and the baselines are complete. Evidence is collected automatically for controls a cloud control plane can show, such as configuration, access and logging settings. Controls that depend on policy, people or facilities are tracked in the same record with the documents your team supplies. PolicyCortex does not observe those for you, and anything not observed is recorded as a declared gap.

**Q: Can it produce the ATO package for eMASS?**
A: The SSP, SAR and POA&M are generated from the implementation record and export as OSCAL 1.1.2, with the POA&M also as the eMASS POA&M worksheet. The POA&M XML uses the PolicyCortex schema, and its import into eMASS has not been verified. Your assessor assesses and your authorizing official decides.

**Q: Does software grant an ATO or a continuous ATO?**
A: No. The authorizing official decides whether a system operates. PolicyCortex records that decision with the package it rested on and checks the authorized system against the official's stated tolerance.

**Q: Does PolicyCortex make us compliant?**
A: No. It produces the records compliance decisions rest on. The authorizing official, the C3PAO, or the accountable official makes the determination; PolicyCortex hands them evidence they can recompute instead of a narrative they have to believe.

## Related solutions

- [FedRAMP](https://policycortex.com/solutions/fedramp)
- [NIST SP 800-171](https://policycortex.com/solutions/nist-800-171)
- [Federal R&D](https://policycortex.com/solutions/federal-rd)
- [Continuous monitoring](https://policycortex.com/solutions/automated-monitoring)

Bring your baseline and your authorizing official. [Request Access](https://app.policycortex.com/auth?mode=request-access) · [Book a call](https://policycortex.com/book)

## Register colophon

| Seq | Label | SHA3-256 | Prev |
|---|---|---|---|
| REC 0000 | OBLIGATION | 6b0e8cda7aea | 4a4ec65a151a |
| REC 0001 | EVIDENCE | 0be363e0799a | 6b0e8cda7aea |
| REC 0002 | VERIFICATION | 0330dfb19d2d | 0be363e0799a |
| REC 0003 | EVALUATION | a0e6d1aed3c6 | 0330dfb19d2d |
| REC 0004 | DELIVERY | 503b2df5f84a | a0e6d1aed3c6 |
| REC 0005 | QUESTIONS | 3fea0aef8fd0 | 503b2df5f84a |

Head sha3:3fea0aef8fd0e2c307b8f543e8111129e72f89f2f698883de87282a3937c5c6e. Each digest is SHA3-256 over the previous digest, the register key, the record label, and the record copy; a second party can recompute it from this document.