Calling All CUI Defenders

NIST just dropped two new drafts for public comment, and if you’re in the defense supply chain, this is your moment to pay attention.

• SP 800-172 Revision 3 (final public draft): introduces enhanced security requirements aimed squarely at nation-state-level adversaries.
• SP 800-172A Revision 3 (initial public draft): delivers the companion assessment guide to measure whether those protections actually work.

Together, they build on the familiar SP 800-171 framework, transforming it from a compliance checklist into something far more valuable: a blueprint for real resilience.

Why It Matters for You

This isn’t just another standards update buried in the alphabet soup of cybersecurity acronyms.

For defense contractors and suppliers, what you see in these drafts today could soon become tomorrow’s hard requirements, shaping CMMC assessments, DFARS clauses, and your eligibility to win or keep defense contracts.

Put plainly: this is about more than compliance. It’s about business continuity in a highly competitive, high-stakes ecosystem.

The Call for Feedback

NIST wants your input — and the deadline is November 14, 2025.

Your feedback will help determine whether these requirements are realistic for organizations that actually have to implement them, while still holding the line against advanced persistent threats.

• Stronger standards mean stronger defenses.
• Stronger defenses mean better protection of sensitive government data.
• And ultimately, that protection ensures our national security is harder to compromise.

More Than a Policy Update

This is your chance to influence the rules before they’re finalized. Contractors, agencies, academia, all have a stake in shaping guidance that will define compliance and security expectations for years to come.

If you’re part of the defense industrial base, the steps are clear:

1. Engage your compliance and security teams now.
2. Map these draft requirements against your CMMC preparation.
3. Identify potential gaps early.
4. Submit thoughtful feedback by the deadline.

The rules you’ll be measured against tomorrow are being drafted today. Don’t sit on the sidelines. Be part of defining how we defend CUI against nation-state-level threats.

Where Cyber Defense Advisors Comes In

At Cyber Defense Advisors (CDA), we help defense contractors navigate these evolving requirements, from CMMC readiness to DFARS alignment to building resilient security programs that withstand the threats NIST is warning about.

We don’t just interpret the standards. We help you implement them in a way that makes sense for your business — ensuring compliance translates into actual security.

Ready to prepare for SP 800-172r3 and beyond?

Contact Cyber Defense Advisors with any questions or for cyber security support.