---
title: Apply a rule to an existing vulnerability
description: When you change a classification rule, rerun all the active rules on all the vulnerability entries. You can also retrofit the existing vulnerabilities, by applying the newly created classification rules to the existing vulnerabilities.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/security-management/vulnerability-response/apply-rule-existing-vulnerability.html
release: australia
product: Vulnerability Response
classification: vulnerability-response
topic_type: task
last_updated: "2026-03-12"
reading_time_minutes: 1
breadcrumb: [Create and edit a classification group, Vulnerability Response remediation overview, Vulnerability Response, Unified Security Exposure Management, Security Operations]
---

# Apply a rule to an existing vulnerability

When you change a classification rule, rerun all the active rules on all the vulnerability entries. You can also retrofit the existing vulnerabilities, by applying the newly created classification rules to the existing vulnerabilities.

## Before you begin

Role required: sn\_vul.manage\_classification\_rule

## Procedure

1.  Navigate to **All** > **Vulnerability** > **Administration** > **Vulnerability Classification Rules**.

2.  To select a rule, select the check box next to the rule.

3.  Click **Apply Changes**.

4.  Click **Reapply**.