Blast-radius analysis estimates how far a failure, security incident, or compromised component could affect connected systems, services, and data. It maps dependencies and trust relationships to identify what might be disrupted if a system is unavailable or an attacker gains access.
In cybersecurity, this analysis helps teams prioritize protections and limit the impact of incidents. For example, defenders can use dependency maps to find critical services reachable from a compromised account, then apply network segmentation, least-privilege access, and recovery plans to contain the spread. During platform changes or cloud migrations, reassessing the blast radius can reveal newly introduced dependencies and gaps in monitoring. The result is a practical view of potential business and customer impact—not a prediction that an incident will necessarily occur.