NIST 800-53 AC (Access Control) Family Explained

AC themes

• Account management and termination
• Least privilege and separation of duties
• Remote access and shared accounts
• Session controls and information flow

Evidence

IdP exports, access review sign-offs, PAM session logs, and change tickets for role updates.

Monitoring

Alert on anomalous admin use and failed privileged authentication — feed into continuous monitoring narratives.

How CyberSilo Helps

• Evidence mapping in CyberSilo CSA
• Detection and logging proof with ThreatHawk SIEM
• Advisory scoping — contact CyberSilo

Frequently Asked Questions

AC vs IA family?

IA covers identification/authentication mechanisms; AC covers authorisation and session policy.

Cloud inheritance?

Document which AC controls the CSP inherits vs your tenant config.

CMMC overlap?

Strong AC evidence transfers into 800-171 practice discussions.

Related Resources

• SI family
• NIST hub