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Glossary Defense & Monitoring Updated Jun 12, 2026

External Attack Surface Management

Tools and practices for mapping and reducing an organization's internet-exposed assets and identity exposures.

Also known as EASM external ASM

External Attack Surface Management (EASM) platforms discover and monitor an organization's public-facing assets: domains, subdomains, cloud storage buckets, APIs, and certificates. The goal is to find and fix exposures before attackers exploit them.

EASM becomes significantly more effective when paired with infostealer intelligence. Knowing which assets exist is only half the picture. Knowing which employee credentials and session tokens are already in criminal hands completes it.

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