What is CVE?

CVECVE (Common Vulnerabilities and Exposures) is a publicly maintained catalogue of known cybersecurity vulnerabilities, each assigned a unique identifier (e.g. CVE-2024-12345) to enable consistent tracking and communication across tools and organisations.

CVE Explained in Detail

The CVE system, maintained by MITRE Corporation and funded by CISA, provides a standardised way to reference specific vulnerabilities. Each CVE entry includes a description, affected products, severity score (CVSS), and references to patches or advisories.

CVE Lifecycle

  1. Discovery — A vulnerability is found by a researcher, vendor, or attacker.
  2. Assignment — A CVE Numbering Authority (CNA) assigns a CVE ID.
  3. Publication — Details are published in the NVD (National Vulnerability Database).
  4. Remediation — Vendors release patches; organisations apply fixes based on risk priority.

CVSS Severity Ratings

  • Critical (9.0–10.0) — Immediate patching required.
  • High (7.0–8.9) — Patch within days.
  • Medium (4.0–6.9) — Patch within weeks.
  • Low (0.1–3.9) — Patch during next maintenance window.

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