What is CVE-2025-21283?

CVE-2025-21283 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under CWE-1222. CVSS score: 6.5/10. Published 2025-02-06.

How severe is CVE-2025-21283?

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

Vulnerability in Microsoft Edge Chromium

CVE-2025-21283

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

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

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.

EPSS exploit prediction

EPSS: 0.015 (73.3th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-1222

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21283 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-21283?: CVE-2025-21283 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under CWE-1222. CVSS score: 6.5/10. Published 2025-02-06.
How severe is CVE-2025-21283?: Medium severity. CVSS v3 base score is 6.5 out of 10.