What is CVE-2022-21996?

CVE-2022-21996 is a high-severity vulnerability in Microsoft Windows 11. CVSS score: 7.8/10. Published 2022-02-09.

How severe is CVE-2022-21996?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Microsoft Windows 11

CVE-2022-21996

Win32k Elevation of Privilege Vulnerability

Published 2022-02-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.030 (87.1th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000

Affected products

Microsoft Windows 11
Microsoft Windows 11 Version 21h2 — versions 10.0.0

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21996 (vendor-advisory)

Frequently asked questions

What is CVE-2022-21996?: CVE-2022-21996 is a high-severity vulnerability in Microsoft Windows 11. CVSS score: 7.8/10. Published 2022-02-09.
How severe is CVE-2022-21996?: High severity. CVSS v3 base score is 7.8 out of 10.