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Training Camp • Cybersecurity Glossary
Blast radius is the total scope of damage an attacker could reach from one compromised identity or resource, limited by least privilege.
Blast Radius Definition: Blast radius is the total scope of damage an attacker could reach from one compromised identity or resource, limited by least privilege.
In cybersecurity, blast radius refers to the total scope of damage, access, and lateral movement an attacker could achieve if a given identity, credential, host, or cloud resource is compromised. Minimizing blast radius is a core goal of least privilege, segmentation, and Zero Trust design, limiting how far a single breach can spread. In cloud environments it often measures the permissions and resources reachable from one over-privileged role.
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