CVE-2026-27906 — Improper Input Validation in Microsoft Windows 10 Version 21h2

CWE-20 — Improper Input Validation3 documents3 sources
Severity
4.4MEDIUMNVD
EPSS
0.1%
top 75.08%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
7
Microsoft Windows 10 Version 21h2Microsoft Windows 10 Version 22h2Microsoft Windows 11 Version 22h3+4 more
Timeline
PublishedApr 14

Description

Improper input validation in Windows Hello allows an authorized attacker to bypass a security feature locally.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:NExploitability: 0.8 | Impact: 3.6

Affected Packages7 packages

▶CVEListV5microsoft/windows_10_version_21h210.0.19044.0 — 10.0.19044.7184
▶CVEListV5microsoft/windows_10_version_22h210.0.19045.0 — 10.0.19045.7184
▶CVEListV5microsoft/windows_11_version_22h310.0.22631.0 — 10.0.22631.6936
▶CVEListV5microsoft/windows_11_version_23h210.0.22631.0 — 10.0.22631.6936
▶CVEListV5microsoft/windows_11_version_24h210.0.26100.0 — 10.0.26100.8246

🔴Vulnerability Details

2
CVEList
Windows Hello Security Feature Bypass Vulnerability↗2026-04-14
▶
GHSA
GHSA-qqjc-23pp-wrrm: Improper input validation in Windows Hello allows an authorized attacker to bypass a security feature locally↗2026-04-14
▶
CVE-2026-27906 — Improper Input Validation in Microsoft | cvebase