What is CVE-2021-34466?

CVE-2021-34466 is a medium-severity vulnerability in Microsoft Windows 10, classified under Authentication Bypass by Spoofing. CVSS score: 5.7/10. Published 2021-07-16.

How severe is CVE-2021-34466?

Medium severity. CVSS v3 base score is 5.7 out of 10.

Vulnerability in Microsoft Windows 10

CVE-2021-34466

Windows Hello Security Feature Bypass Vulnerability

EPSS: 0.006 (47.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Microsoft Windows_10 — versions 20h2, 21h1, 1809
Microsoft Windows 10 Version 1809 — versions 10.0.0, 10.0.17763.0
Microsoft Windows 10 Version 1909 — versions 10.0.0
Microsoft Windows 10 Version 2004 — versions 10.0.0
Microsoft Windows 10 Version 20h2 — versions 10.0.0
Microsoft Windows 10 Version 21h1 — versions 10.0.0

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

af854a3a-2127-422b-91ae-364da2661108 (Patch, x_refsource_MISC, Vendor Advisory)
secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2021-34466?: CVE-2021-34466 is a medium-severity vulnerability in Microsoft Windows 10, classified under Authentication Bypass by Spoofing. CVSS score: 5.7/10. Published 2021-07-16.
How severe is CVE-2021-34466?: Medium severity. CVSS v3 base score is 5.7 out of 10.