Security Impact Analysis

One field on the change record meets the single objective.

Objective [a] asks that security impact is analyzed before implementation. Add a security impact section to the CM.L2-3.4.3 change record that answers three questions. Does the change alter or create security configuration settings? Does it affect how CUI, controlled unclassified information, is protected? Does documentation need updating? A sentence or two per change is a real analysis.

The analyst needs enough knowledge to answer, not a title.

Whoever can weigh the change against the baseline and the system security plan, the document that describes how your system meets each requirement, performs the analysis. In a small company that is the administrator proposing the change plus whoever approves it. Record the conclusion, even when the conclusion is no impact.

Auto-update stays on. Feature updates wait.

Security patches remediate flaws and can flow automatically under a pre-approved standard change. Feature updates add functionality that deserves analysis before it lands. Defer feature updates with whatever your stack provides, such as Windows Update rings in Intune or Group Policy. Use the deferral window to read what is changing before it arrives.

Do the analysis before, not as archaeology after.

An analysis reconstructed at assessment time is visible as such. The dated impact field on the change record, filled in before the implementation date, is the evidence [a] asks for.