Vulnerability Remediation: A Practical Guide to Fixing What Matters

Triage: Not Everything Needs Fixing

Not every finding requires immediate action. Informational findings provide awareness but don't require remediation. Low-severity findings in non-critical systems can wait for the next maintenance cycle. Findings with effective compensating controls may be risk-accepted with proper documentation. Focus remediation energy on the findings that represent genuine, exploitable risk to your critical assets.

Severity-Based Timelines

Define remediation timelines by severity: Critical—begin remediation within 24 hours, resolve within 7 days. High—begin within 48 hours, resolve within 14 days. Medium—begin within 7 days, resolve within 30 days. Low—resolve within 90 days or next maintenance cycle. Document these timelines in your security policy and enforce them through your issue tracking system.

Remediation Ownership

Every finding needs a human owner—someone accountable for its resolution. Security teams triage and assign. Engineering teams remediate. The security team shouldn't be writing patches; the engineering team shouldn't be deciding severity. Clear role separation prevents both bottlenecks and finger-pointing.

Fix Verification

A 'fixed' finding without verification evidence is an assumption, not a fact. Rescan after remediation to confirm the vulnerability is resolved. This verification is what compliance frameworks require and what genuinely reduces risk. Penetrify includes retesting in every engagement—so fix verification doesn't require a separate engagement or additional cost.

Remediation Metrics

Track mean time to remediate (MTTR) by severity tier, percentage of findings remediated within policy timelines, rescan pass rate (percentage of fixes confirmed on first verification), and finding recurrence rate (the same vulnerability reappearing in subsequent assessments). Decreasing MTTR and recurrence rate demonstrate programme maturity.