What is CVE-2025-21279?

CVE-2025-21279 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 6.5/10. Published 2025-02-06.

How severe is CVE-2025-21279?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Microsoft Edge Chromium

CVE-2025-21279

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

EPSS: 0.016 (72.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Microsoft Edge_chromium
Microsoft Edge (Chromium-based) — versions 1.0.0.0

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-21279?: CVE-2025-21279 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 6.5/10. Published 2025-02-06.
How severe is CVE-2025-21279?: Medium severity. CVSS v3 base score is 6.5 out of 10.