Date Published: September 29, 2025
Comments Due:
Email Comments to:
Planning Note (11/13/2025):
The public comment period has been extended through January 16, 2026.
Author(s)
Ron Ross (NIST), Victoria Pillitteri (NIST)
Announcement
As part of ongoing efforts to strengthen the protections for securing controlled unclassified information (CUI) in nonfederal systems, NIST has released the following drafts for comment:
- SP 800-172r3 (Revision 3) fpd (final public draft), Enhanced Security Requirements for Protecting Controlled Unclassified Information, provides new enhanced security requirements that support cyber resiliency objectives, focus on protecting CUI, and are consistent with the source controls in SP 800-53r5.
- SP 800-172Ar3 ipd (initial public draft), Assessing Enhanced Security Requirements for Controlled Unclassified Information, provides a set of assessment procedures for the enhanced security requirements. These procedures are based on the source assessment procedures in SP 800-53Ar5.
Both drafts implement a one-time “revision number” change for consistency with SP 800-171r3 and SP 800-171Ar3.
NIST seeks feedback on both drafts during a 45-day public comment period, from September 29 through November 14, 2025 January 16, 2026. NIST is specifically interested in comments, feedback, and recommendations on the following topics:
- The additional enhanced security requirements to protect critical systems and high value assets
- The mappings between the enhanced security requirements to the SP 800-160 protect strategies and adversary effects
- The usefulness of the information in the supplementary Appendices
Learn More about the Protecting CUI Project.
The protection of Controlled Unclassified Information (CUI) resident in nonfederal systems and organizations is of paramount importance to federal agencies and can directly impact the ability of the Federal Government to successfully conduct its essential missions and functions. This publication provides federal agencies with recommended security requirements for protecting the confidentiality, integrity, and availability of CUI when it is resident in a nonfederal system and organization and associated with a critical program or high value asset (HVA). The security requirements apply to the components of nonfederal systems that process, store, or transmit CUI or that provide protection for such components. The enhanced security requirements are intended for use by federal agencies in contractual vehicles or other agreements established between those agencies and nonfederal organizations.
The protection of Controlled Unclassified Information (CUI) resident in nonfederal systems and organizations is of paramount importance to federal agencies and can directly impact the ability of the Federal Government to successfully conduct its essential missions and functions. This publication...
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The protection of Controlled Unclassified Information (CUI) resident in nonfederal systems and organizations is of paramount importance to federal agencies and can directly impact the ability of the Federal Government to successfully conduct its essential missions and functions. This publication provides federal agencies with recommended security requirements for protecting the confidentiality, integrity, and availability of CUI when it is resident in a nonfederal system and organization and associated with a critical program or high value asset (HVA). The security requirements apply to the components of nonfederal systems that process, store, or transmit CUI or that provide protection for such components. The enhanced security requirements are intended for use by federal agencies in contractual vehicles or other agreements established between those agencies and nonfederal organizations.
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Keywords
advanced persistent threat; contractor systems; controlled unclassified information; CUI registry; enhanced security requirement; Executive Order 13556; FISMA; NIST Special Publication 800-172; NIST Special Publication 800-53; nonfederal organizations; nonfederal systems; security assessment; security control; security requirement
Control Families
None selected
