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Glossary · EASM

What is EASM?

External Attack Surface Management (EASM) is a continuous, attacker's-eye-view inventory of every internet-facing asset that belongs to your organisation — subdomains, exposed services, open ports, third-party dependencies, leaked credentials, lookalike domains, expired SSL certificates, and forgotten cloud assets. Unlike traditional vulnerability scanning, EASM operates from the public internet without any internal access, surfacing shadow IT and supply-chain exposures that internal tools miss.

EASM platforms (Infilux's own GuardEon, plus Bitsight, Censys, CyCognito, SocRadar) operate by combining DNS enumeration, certificate-transparency monitoring, port and service fingerprinting, dark-web crawling, and brand-impersonation detection. The goal is to know what an attacker reconning your organisation would discover before they discover it.

Where traditional vulnerability management is inward-looking — agents on your servers, scans of CIDR ranges you provide — EASM is outward-looking. It finds the dev subdomain a contractor stood up two years ago, the AWS S3 bucket your subsidiary forgot to lock down, the API endpoint that returned to public after a misconfigured load-balancer change, and the typosquat domain registered by a phishing crew last week.

Risk scoring in EASM is dynamic. Each finding gets a continuously-updated criticality score based on exploitability (known CVE? public PoC?), exposure (anonymously reachable? authentication-gated?), and business impact (production user data? payment flows?). Most platforms integrate with ticketing (Jira, ServiceNow) to route findings to the responsible engineering team.

Key points

  • Continuous, outside-in asset discovery (no internal agents).
  • Surfaces shadow IT, forgotten cloud assets, supply-chain exposures.
  • Combines DNS, cert transparency, dark web, port/service fingerprinting, brand monitoring.
  • Real-time risk scoring with ticketing integration (Jira, ServiceNow, Slack).
  • Required for mature programmes under NIST CSF 2.0 ID.AM-2 and CIS Control 1.

Frequently asked

How is EASM different from a vulnerability scanner?+
Vulnerability scanners (Nessus, Qualys) require you to tell them what to scan — CIDR ranges, hostnames, IPs. EASM discovers what to scan by recon-ing the public internet first. If you don't know about an asset, a vulnerability scanner can't help; EASM finds it and then scans it.
Does EASM replace pen-testing?+
No. EASM is continuous breadth. Pen-testing is point-in-time depth. EASM finds 'this S3 bucket is publicly readable'; pen-testing answers 'and here is what an attacker would do with that to pivot into your production data.' Mature programmes run both.
What's the typical ROI on EASM?+
EASM customers typically discover 15–30% more internet-facing assets than their CMDB knows about within the first 30 days. The blast radius reduction from closing those assets — typically 5–10 critical exposures per quarter — is usually multiples of the platform cost.
How does GuardEon compare to Bitsight?+
Bitsight is primarily a third-party risk-rating platform — it grades vendors A–F for procurement teams and insurance brokers. GuardEon is operational EASM for the security team: continuous subdomain discovery, dark-web monitoring, brand-impersonation detection, and ticketing-integrated remediation workflows. Bitsight is the better fit if you're a CISO scoring 200 vendors; GuardEon is the better fit if you're defending your own attack surface.
How does GuardEon compare to CyCognito?+
CyCognito is a strong enterprise EASM aimed at Fortune-500 estates with complex M&A footprints and six-figure annual budgets. GuardEon delivers comparable discovery (subdomains, exposed services, leaked credentials, lookalike domains) at SaaS-mid-market pricing, plus bundled threat-intelligence feeds and a managed-service option where the Infilux SOC validates findings before they land in your Jira queue. If you want a self-serve enterprise tool, CyCognito; if you want EASM + a security team behind it, GuardEon.
How does GuardEon compare to Censys or Shodan?+
Censys and Shodan are internet-wide scan engines and certificate-transparency aggregators — excellent data sources, but you bring your own scope, your own correlation, your own risk scoring, and your own workflow. GuardEon is a finished EASM product that consumes those data sources (plus its own collectors), correlates them to your organisation, applies AI risk scoring, and routes findings to ticketing. Censys/Shodan are libraries; GuardEon is the application.
Does GuardEon support GCC / Middle East regulatory requirements?+
Yes. GuardEon supports asset discovery and risk reporting that aligns with UAE IAR (NESA / SIA) controls for critical infrastructure, Saudi NCA Essential Cybersecurity Controls, SAMA Cybersecurity Framework for banks, and Qatar NCSA. Our regional delivery team runs weekly syncs in GST timezone and supports clients across DIFC, ADGM, Riyadh, and Doha.

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GuardEon EASM PlatformDark Web MonitoringVulnerability Management

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