What is CVE-2023-21775?

CVE-2023-21775 is a high-severity vulnerability in Microsoft Edge Chromium. CVSS score: 8.3/10. Published 2023-01-24.

How severe is CVE-2023-21775?

High severity. CVSS v3 base score is 8.3 out of 10.

Vulnerability in Microsoft Edge Chromium

CVE-2023-21775

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

Published 2023-01-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Microsoft Edge Chromium
Microsoft Edge (Chromium-Based) — versions 1.0.0
Microsoft Edge (Chromium-Based) Extended Stable — versions 1.0.0

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21775 (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2023-21775?: CVE-2023-21775 is a high-severity vulnerability in Microsoft Edge Chromium. CVSS score: 8.3/10. Published 2023-01-24.
How severe is CVE-2023-21775?: High severity. CVSS v3 base score is 8.3 out of 10.