Threat intel, DFIR
and security notes
Deep-dives, investigation write-ups, tooling notes and transparent product updates from the mlab team. Written for analysts who want the indicators, the method and the fix.
#prioritization
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CVSS 4.0 Explained: Reading a Vector String Step by Step
CVSS 4.0 renamed, split and added metrics, dropped Scope, and introduced labels like CVSS-BT so you know which score you are looking at. A metric by metric walkthrough of a 4.0 vector, and what changed from 3.1.
Exploit Prediction with EPSS: What the Score Means and What It Does Not
EPSS gives every CVE a daily probability of exploitation in the wild. Here is what the model actually predicts, how to read scores versus percentiles, and where the number stops helping.
CVSS, EPSS, KEV: How to Actually Prioritize Vulnerabilities
Patching by CVSS score alone drowns your team in criticals that will never be exploited. Here is how to combine CVSS, EPSS, and CISA KEV into a priority queue that works.
inkdex: an index that states facts, a scanner that judges them
Studies, benchmarks and build notes. Method first, numbers included, losses too.
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