What is CVE-2021-31982?

CVE-2021-31982 is a high-severity vulnerability in Microsoft Edge Chromium, classified under Protection Mechanism Failure. CVSS score: 8.8/10. Published 2023-07-01.

How severe is CVE-2021-31982?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Microsoft Edge Chromium

CVE-2021-31982

Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

Published 2023-07-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (70.1th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31982 (vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-31982?: CVE-2021-31982 is a high-severity vulnerability in Microsoft Edge Chromium, classified under Protection Mechanism Failure. CVSS score: 8.8/10. Published 2023-07-01.
How severe is CVE-2021-31982?: High severity. CVSS v3 base score is 8.8 out of 10.