Many organizations have more vulnerabilities than they can patch immediately. The challenge is deciding what deserves attention first.
A useful signal is whether attackers are actually exploiting a vulnerability. CISA's Known Exploited Vulnerabilities catalogue exists specifically to identify vulnerabilities with evidence of exploitation in the wild.
CVSS is useful, but it is not the whole decision
A high severity score describes technical characteristics. It does not automatically tell you whether your system is exposed, whether attackers are using the flaw today or whether the affected system holds privileged access to the rest of your business.
A practical small-business order
1. Internet-facing and actively exploited. These systems give attackers both opportunity and a proven technique.
2. Identity and security infrastructure. Compromise of authentication, firewalls, remote access or management tools can have an outsized impact.
3. Critical business systems. Prioritize systems whose loss would stop operations or expose sensitive information.
4. Everything else. Maintain a normal patch cadence so lower-priority findings do not become permanent technical debt.
Don't forget compensating controls
If a patch cannot be installed immediately, reduce exposure where possible: restrict access, disable vulnerable features, monitor for exploitation and document when the permanent fix will be applied.
Source: U.S. Cybersecurity and Infrastructure Security Agency (CISA), Known Exploited Vulnerabilities Catalog.
Simple IT. Strong Security. — CyberEase
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