What is CVE-2025-21267?

CVE-2025-21267 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under CWE-358. CVSS score: 4.4/10. Published 2025-02-06.

How severe is CVE-2025-21267?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Microsoft Edge Chromium

CVE-2025-21267

Microsoft Edge (Chromium-based) Spoofing Vulnerability

Published 2025-02-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Microsoft Edge Chromium
Microsoft Edge (Chromium-Based) — versions 1.0.0.0

Weakness classification (CWE)

CWE-358

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21267 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-21267?: CVE-2025-21267 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under CWE-358. CVSS score: 4.4/10. Published 2025-02-06.
How severe is CVE-2025-21267?: Medium severity. CVSS v3 base score is 4.4 out of 10.