Vulnerability remediation is the process of fixing a security flaw so it can no longer be used as an attack path. Remediation can include applying a patch, changing a configuration, disabling a vulnerable feature, or replacing exposed software. The goal is not just to identify risk, but to remove or reduce the weakness in a way that blocks exploitation.
It matters because unremediated vulnerabilities are one of the most common ways attackers gain access, move laterally, or escalate privileges. In practice, defenders use remediation to close internet-facing services first, then work through internal systems based on exposure and business impact. Good remediation depends on accurate inventory, testing, change control, and fast coordination between security and operations. In vendor patch programs, the remediation cycle and its cadence can be as important as the fix itself, because a shorter window leaves less time for attackers to weaponize a known flaw.