Vulnerability management is the practice of identifying, assessing, and prioritizing weaknesses across an environment so that remediation effort is directed at the risks that matter most. It provides a continuous, organized view of where an organization is exposed and how urgent each exposure is.

Within the Preparation phase, vulnerability management is how defenders stay ahead of problems rather than reacting to them. Every environment carries more weaknesses than any team can fix at once, so the discipline is less about finding issues and more about deciding which to address first. Clear prioritization keeps attention on the exposures most likely to be exploited and most damaging if they are.

In practice, vulnerability management runs a repeating cycle: discover assets, scan and assess for weaknesses, prioritize by severity and real-world exposure, remediate or mitigate, and verify the result. Prioritization weighs factors such as severity ratings, whether a weakness is actively exploited, and the criticality and reachability of the affected asset. The process depends on accurate asset data and feeds directly into patching and hardening. Treated as an ongoing program rather than a periodic scan, it steadily lowers the organization's overall exposure.

References#

• NIST SP 800-40, Guide to Enterprise Patch Management Planning
• CISA, Stakeholder-Specific Vulnerability Categorization guidance