Framework overlap

Does C2M2 cover CISA Industrial Control Systems (ICS) Security Guidance?

You hold C2M2 and have been told to do CISA Industrial Control Systems (ICS) Security Guidance. Here is how much overlaps, control by control.

69% of CISA Industrial Control Systems (ICS) Security Guidance you already have

C2M2 already covers about 69% of CISA Industrial Control Systems (ICS) Security Guidance, leaving 5 of 16 controls as genuinely new work.

Already covered 0 Likely covered 11 New work 5

No control in C2M2 maps directly to one in CISA Industrial Control Systems (ICS) Security Guidance. 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 C2M2 reaches these. This is the list to scope.

CISA-ICS-7S-1
Implement Application Allowlisting (Whitelisting)
CISA-ICS-7S-2
Ensure Proper Configuration and Patch Management
CISA-ICS-7S-6
Implement Secure Remote Access
CISA-ICS-DID-23
Physical Security
CISA-ICS-DID-26
Host Security (Patch, Field Devices, Virtual Machines)
Show the 11 you already have
CISA-ICS-7S-3
Reduce Your Attack Surface Area
CISA-ICS-7S-4
Build a Defendable Environment
CISA-ICS-7S-5
Manage Authentication
CISA-ICS-7S-7
Monitor and Respond
CISA-ICS-DID-21
Risk Management for ICS
CISA-ICS-DID-22
Asset Inventory and Risk Characterization
CISA-ICS-DID-24
ICS Network Architecture
CISA-ICS-DID-25
Security Architecture (Perimeter, Firewalls, Diodes, Access)
CISA-ICS-DID-27
Security Monitoring (IDS/IPS, Logging, SIEM)
CISA-ICS-DID-28
Vendor Management and Supply Chain Security
CISA-ICS-DID-29
The Human Element (Awareness and Training)

How this is calculated

Already covered means a mapping runs from a control in C2M2 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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