Virtual Patch Management

Short definition: Temporary protections applied at network or application level until official patches are available.
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What it is

Virtual patching uses WAF rules, IPS signatures, or network filters to block exploit attempts before a vendor releases a formal patch.

Why it matters

Zero-day attacks often arrive before patches. Virtual patching reduces exposure while maintaining uptime for critical systems.

How to reduce risk

• Deploy WAF protections
• Enable IDS/IPS signatures
• Monitor emerging CVEs
• Patch as soon as vendor updates arrive
• Prioritize critical external services
• Review virtual patch rules regularly

Related Terms

• Threat Intelligence
• Zero-Day
• Ransomware

External Resources

• OWASP Virtual Patching: https://owasp.org/www-project-web-security-testing-guide/v41/4-Web_Application_Security_Testing/
• CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities