GCP Security Command Center Calculator

Posture = 0.7 × (100 − min(60, 0.45 × weighted findings per 1000 assets) − min(25, 3 × attack exposure score)) + 0.3 × CIS pass rate. Security Command Center Premium adds something the other providers score differently: an attack exposure number that models whether a real path exists from the internet to a resource you flagged as high value. That is treated as a separate penalty of up to 25 points, because a single reachable path matters more than a hundred findings on isolated dev projects.

GCP posture is dominated by organisation policy and IAM at the folder level, so per-project finding counts tell you where the work is while the attack exposure score tells you whether any of it is urgent.

This calculator takes 9 inputs: Projects in the organisation, Assets inventoried, Critical findings, High findings, Medium findings, Low findings, Muted findings, Highest attack exposure score, CIS Google Cloud benchmark pass rate. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

Simulated reachability. Security Command Center builds a graph of your resources and IAM, marks the resources you designate as high value, then simulates whether an external attacker can reach them and how easily. A score of 8 means a short, live path exists — that is an incident-grade finding regardless of its severity label.

Yes, muted findings are outside the weighted total, which is exactly why the muted share is reported next to it. Mute rules written broadly — by finding class rather than by resource — quietly remove whole categories from view and are worth reviewing quarterly.