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Security Operations · Intermediate

Attack Surface Management (ASM)

Continuous discovery, inventory and monitoring of an organization's internet-facing assets and exposures.

Definition

External ASM tools find domains, subdomains, IPs, cloud services, certificates and exposed services, including unknown assets, and flag risky exposures such as open RDP or outdated software. Palo Alto Cortex Xpanse is an example. ASM complements internal vulnerability scanning.

Example

ASM discovering a forgotten test server with an exposed database port.

Exam tip

ASM finds the unknown assets that scheduled scans miss.

Related terms