What is the difference between CIS Benchmarks and DISA STIGs?

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The practical selection rule: if you operate DoD or DoD-contractor systems where STIGs are contractually mandated, STIGs are non-negotiable. Everywhere else, CIS Benchmarks are the more widely referenced baseline, with Level 1 and Level 2 profiles that let organizations tune strictness to operational impact rather than accepting DoD-grade restrictions everywhere.

Because both documents harden the same operating systems and platforms, most controls address the same settings, and for some operating systems CIS publishes benchmark profiles aligned to the corresponding STIG. Organizations serving both commercial and defense customers commonly scan against CIS Benchmarks continuously and use the results as the baseline evidence for both worlds.