Vulnerability

EPSS over CVSS: prioritising the CVEs attackers actually exploit

The Onam Security TeamJune 3, 20265 min read

This post explores epss over cvss: prioritising the cves attackers actually exploit — a topic that comes up in almost every conversation we have with cloud security teams.

The short version

Most teams inherit an environment that has been growing for years. The result is a mix of legacy defaults, ad-hoc exceptions, and controls that were right at the time and haven't been reviewed since. The category this post covers — Vulnerability — sits at exactly that intersection: high leverage if you get it right, high blast radius if you don't.

What we see in the wild

  • Findings that look identical on paper but have wildly different real-world impact.
  • Controls that pass every audit but leave the door open to a chained attack.
  • Prioritization based on severity alone, which quietly buries the findings that matter.

A better approach

Think of security posture as a graph, not a list. A misconfiguration in isolation is a data point; a misconfiguration that sits on a path from the public internet to your most sensitive data is an incident waiting to happen. That's the shift Onam is built around.

"The right question isn't 'how many findings do I have?' It's 'which two findings turn into a breach if I don't fix them this week?'"

Where to go next

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