Continuous discovery and monitoring of internet-facing assets to identify security exposures.
External Attack Surface Management (EASM) provides continuous visibility into an organisation's internet-facing assets—domains, IP addresses, cloud services, web applications, and exposed services. EASM tools discover assets (including shadow IT and forgotten systems), identify vulnerabilities, detect misconfigurations, and monitor for changes. This outside-in view reveals what attackers see when scanning your organisation. EASM has become essential as cloud adoption and remote work expand external exposure beyond traditional perimeters.
Why It Matters
The DSC Perspective:
Your external attack surface is what attackers probe first. EASM reveals unknown exposures—the forgotten test server, the marketing site with outdated plugins, the cloud bucket with public access. Regular external assessment should be part of security programmes.