Framework overlap

Does SSAE 18 cover NIST SP 800-82 Revision 3: Guide to Industrial Control Systems (ICS) Security?

You hold SSAE 18 and have been told to do NIST SP 800-82 Revision 3: Guide to Industrial Control Systems (ICS) Security. Here is how much overlaps, control by control.

100% of NIST SP 800-82 Revision 3: Guide to Industrial Control Systems (ICS) Security you already have

SSAE 18 already covers about 100% of NIST SP 800-82 Revision 3: Guide to Industrial Control Systems (ICS) Security, leaving 0 of 8 controls as genuinely new work.

Already covered 0 Likely covered 8 New work 0

No control in SSAE 18 maps directly to one in NIST SP 800-82 Revision 3: Guide to Industrial Control Systems (ICS) Security. Everything counted as covered is covered because both map to the same third standard, which is what a crosswalk is, but it is an inference rather than a lookup.

What is genuinely new work

Nothing in SSAE 18 reaches these. This is the list to scope.

Nothing. Every control is reached.

Show the 8 you already have
NISTSP82-1
OT Security Program Governance, Policy, Roles, and Safety-Security Integration
NISTSP82-2
OT Risk Assessment and Threat/Vulnerability Identification
NISTSP82-3
OT Network Architecture: Zoned Architecture, Conduits, Segmentation, and Defence-in-Depth
NISTSP82-4
OT Access Control, Identity, Authentication, and Remote Access
NISTSP82-5
OT Configuration Management, Patching, Vulnerability Management, and Malware Protection
NISTSP82-6
OT Audit, Monitoring, Anomaly Detection, and OT-Specific SOC
NISTSP82-7
OT Incident Response, Forensics, Recovery, and Continuity
NISTSP82-8
OT Supply Chain Security, Asset Lifecycle, and Physical Security

How this is calculated

Already covered means a mapping runs from a control in SSAE 18 to that control. Likely covered means no direct mapping exists but both frameworks map to the same control in a third standard. New work means neither. We keep those separate rather than adding them into one friendlier number, because blending them would present a two-hop inference as a verified fact.

Coverage is not symmetric. Run it the other way and you will get a different number; both are correct.

From 332,959 cross-framework control mappings across 723 frameworks, 531 of them verified against their source documents. It does not tell you that you are compliant: a mapped control means the two standards ask for the same thing, not that you have done it.

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