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Vulnerability Management Guide

Overview​

Welcome to the AppSec Atlas Vulnerability Management Guide! In a landscape filled with continuous disclosures of new vulnerabilities, simply scanning and patching is no longer enough. Modern security demands Risk-Based Vulnerability Management (RBVM). This guide provides a comprehensive framework to establish an end-to-end vulnerability management program, integrating real-world threat intelligence to prioritize what actually matters.

Vulnerability management is the systematic process of identifying, evaluating, treating, and reporting on security vulnerabilities in systems and the software that runs on them.

Prerequisites​

To get the most out of this guide, you should have:

  • A basic understanding of network architecture, operating systems, and application environments.
  • Familiarity with the Common Vulnerability Scoring System (CVSS).
  • Basic Python programming skills for the hands-on API labs.
  • An understanding of the software development lifecycle (SDLC) and CI/CD pipelines.

Learning Objectives​

By the end of this guide, you will be able to:

  1. Design a Vulnerability Management Lifecycle: Implement the core phases: Discover, Prioritize, Assess, Report, Remediate, and Verify.
  2. Execute Asset Discovery & Scanning: Differentiate between authenticated/unauthenticated and agent/network-based scans.
  3. Prioritize Risk Effectively: Leverage EPSS (Exploit Prediction Scoring System) and CISA KEV (Known Exploited Vulnerabilities) to focus on critical threats over theoretical ones.
  4. Implement Patch Management: Build emergency patching workflows, apply virtual patching, and handle risk exceptions.
  5. Track Key Metrics (KPIs): Measure program success using MTTR, MTTD, and SLA compliance.
  6. Build a Prioritization Tool: Develop a Python-based utility to prioritize scanner output using real-time EPSS and KEV data.
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