IL5

<p>DoD Impact Level 5: unclassified National Security Systems (NSS) and National Security Information. The Cloud Service Provider Security Requirements Guide rescoped IL5 around NSS in V1R3 of July 2025 and has held it through V1R7 of June 2026, so CUI-only workloads belong at IL4. Posts cover the security delta between IL4 and IL5 and when the higher level is actually required.</p>

Defense

FedRAMP and DoD Impact Levels: A Guide for SBIR Teams

Six months of authorization work does not fit inside a Phase 2 contract with 13 months left. Here is how FedRAMP impact levels, NIST 800-53, and the IL2 to IL5 ladder actually compare for small defense contractors.