Beyond the Checklist: Why Aussie Businesses Need to Rethink How They Patch

For years, many organisations have prioritised software patches based on CVSS scores — a standard rating system that ranks vulnerabilities by severity. But a growing view among security experts is that this checklist approach misses the bigger picture: attackers rarely exploit a single flaw in isolation. Instead, they chain together multiple smaller weaknesses to move through a network and reach valuable data or systems.

This 'chain, not checklist' thinking means defenders should map out how an attacker could realistically travel from an initial entry point to critical assets, then focus patching and controls on the choke points along that path. A vulnerability with a lower severity score might still be dangerous if it sits at a key junction in an attack chain, while a high-scoring flaw on an isolated system may pose less real-world risk.

For small and medium businesses with limited IT resources, this shift matters. Rather than trying to patch everything immediately based on a generic score, it's more effective to understand which systems hold sensitive data or provide access to them, and prioritise closing off the paths attackers would need to reach those systems.