CVSS
Common Vulnerability Scoring System
Common Vulnerability Scoring System, maintained by FIRST; version 4.0 was published in November 2023. It scores technical severity from 0 to 10, not the likelihood of exploitation or the risk to a particular business.
- Defined in
- FIRST CVSS v4.0
Covered in
Prioritize vulnerabilities by exploitation, exposure and impact
Rank vulnerabilities with CISA KEV, EPSS, CVSS 4.0 vectors and SSVC decision points, adjust for presence, reachability and asset value, and turn the result into due dates. Covers NVD's 2026 enrichment changes and CISA BOD 26-04.
Publish security advisories with CSAF, VEX, CVE records and OSV
What a useful security advisory contains and how to publish it in the formats tools read: a validated CSAF 2.0 VEX document, the CSAF provider files, CVE records through a CNA (CVE Record Format 5.2), and OSV records for open-source packages. Covers the status of CSAF 2.1 as of October 2026.