What Is Identity Attack Surface Management?
Identity Attack Surface Management (IASM) is the practice of mapping every path an attacker could use identity and privilege to move through an environment: which accounts are exposed, which credentials are reused, and which chain of permissions turns a single compromised account into a path to domain admin. Where posture management asks "how risky is this account," attack surface management asks "what could someone actually do if they got in here."
The distinction matters because risk and exploitability aren’t the same thing. A moderately risky account with a short, direct escalation path to a crown-jewel system can be a bigger problem than a high-risk account that’s a dead end. IASM is specifically concerned with the paths, not just the individual account scores.
IASM depends on having the full graph of identities, groups, and entitlements correlated in one place. Without that correlation, a tool can flag individual risky accounts but can’t trace the multi-hop path (this service account’s credential, cached on that server, grants access to this admin group) that actually constitutes the exploitable surface.
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