You cannot defend what you do not know you have. Attack Surface Management (ASM) is the continuous discovery, inventory, and monitoring of every internet-facing asset an organization exposes — known and unknown. In an era of cloud sprawl, shadow IT, and constant attacker scanning, ASM has moved from a nice-to-have to a foundational security practice.
Why the attack surface keeps growing
Modern environments expand faster than security teams can track. A forgotten subdomain, a test server left online, an unmanaged cloud bucket, an exposed admin panel, or a third-party integration can each become an entry point. Iranian groups like Fox Kitten built their reputation precisely on scanning for and exploiting unpatched, internet-facing systems — exactly the assets ASM is designed to surface.
EASM and CAASM
External Attack Surface Management (EASM) looks at your organization from the outside in, discovering what an attacker can see and reach. Cyber Asset Attack Surface Management (CAASM) works from the inside, consolidating asset data from your tools to find coverage gaps. Used together, they give a complete picture of exposure.
How attack surface management works
- Discover: continuously map domains, subdomains, IPs, cloud services, and exposed applications.
- Classify: identify what each asset is, who owns it, and what data or access it provides.
- Prioritize: focus on assets that are both exposed and exploitable, not every theoretical finding.
- Remediate and monitor: fix the highest-risk exposures and watch for new ones as they appear.
ASM complements point-in-time testing. It tells you what to test, and our penetration testing and security assessments confirm which exposures are truly exploitable. Combined with threat intelligence, you get an outside-in view that mirrors how attackers actually choose targets. Contact Persist Security to map your real attack surface.
