CVE-2026-27906 json
Windows Hello Security Feature Bypass Vulnerability
published 2026-04-14 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-22444
- cvss
- 4.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
Summary
Improper input validation in Windows Hello allows an authorized attacker to bypass a security feature locally.
Patch / fix
- Microsoft Windows 10 Version 21H2 10.0.19044.7184
- Microsoft Windows 10 Version 22H2 10.0.19045.7184
- Microsoft Windows 11 version 23H2 10.0.22631.6936
- Microsoft Windows 11 Version 24H2 10.0.26100.8246
- Microsoft Windows 11 Version 25H2 10.0.26200.8246
- Microsoft Windows 11 version 26H1 10.0.28000.1836
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.4 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C |
| CNA | 3.1 | 4.4 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N |
Affected products
- Microsoft Windows 10 Version 21H2
- Microsoft Windows 10 Version 22H2
- Microsoft Windows 11 version 23H2
- Microsoft Windows 11 Version 24H2
- Microsoft Windows 11 Version 25H2
- Microsoft Windows 11 version 26H1
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-27906
vendor-advisory, patch
Sources
- CVE List CVE-2026-27906
- NVD CVE-2026-27906
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