NIST 800-53 REV 5 • CONTINGENCY PLANNING
CP-9(4) — Protection from Unauthorized Modification
CMMC Practice Mapping
No direct CMMC mapping
NIST 800-171 Mapping
No direct NIST 800-171 mapping
Related Controls
No related controls listed
Practitioner Notes
This enhancement requires you to protect backups from unauthorized modification — attackers increasingly target backups (especially during ransomware attacks) to prevent recovery.
Example 1: Enable immutable storage on your Azure Blob backup containers or use Veeam Hardened Repository on Linux to prevent anyone from modifying or deleting backups.
Example 2: Store backup copies on write-once media or use S3 Object Lock with compliance mode to ensure backups cannot be altered even by administrators.