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FedRAMP Continuous Monitoring Requirements: Monthly Scans, Annual Assessments and Significant Changes

FedRAMP ConMon explained — monthly vulnerability scanning, annual 3PAO assessments, significant-change handling, and evidence CSPs must sustain after ATO.

Published: September 2026 Compliance · FedRAMP 8–12 min read

Continuous monitoring (ConMon) is how FedRAMP authorization stays alive. After ATO, CSPs must sustain scanning, reporting, annual assessment, and disciplined significant-change handling — not a one-time paperwork exercise.

This page consolidates CyberSilo’s ConMon guidance (including topics previously covered under separate ConMon posts). Related: ThreatHawk for FedRAMP · POA&M · Hub.

ConMon pillars: monthly (or programme-defined cadence) vulnerability scanning and reporting, annual 3PAO assessment, and formal handling of significant changes that may require additional testing or authorization updates.

Monthly Scans and Ongoing Reporting

Annual Assessments

A FedRAMP-accredited 3PAO performs annual assessment activities to confirm controls continue to operate. Treat annual assessment as a planned campaign: freeze evidence packs, refresh SSP deltas, and close high-risk POA&M items before fieldwork.

Significant Changes

Architecture shifts, new services inside the boundary, major identity changes, or crypto module swaps can be significant changes. Document impact, update the SSP, and engage the AO / 3PAO for testing as required — do not silently expand the boundary.

Telemetry That Makes ConMon Defensible

How CyberSilo Helps

Operationalize ConMon, Not Just the ATO

Connect scans, POA&M, and SIEM evidence so monthly and annual cycles become routine.

Frequently Asked Questions

Is ConMon only monthly scans?

No. Scanning is a core cadence, but ConMon also includes reporting, annual assessment, POA&M hygiene, and significant-change control.

What happens if we miss ConMon deliverables?

Authorization risk increases — AOs and the PMO can require corrective action or, in severe cases, threaten authorization status.

Does 20x change ConMon?

Expect more emphasis on continuous, machine-readable indicators. Keep Rev 5 ConMon obligations intact until your package formally transitions.

ThreatHawk FedRAMP · POA&M 30/90/180 · 20x · Hub

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