CVE-2025-53139: Windows Hello Security Feature Bypass Vulnerability

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-14 · updated 2026-06-17
Weakness: CWE-319

Description

Cleartext transmission of sensitive information in Windows Hello allows an unauthorized attacker to bypass a security feature locally.

Affected products

Microsoft Windows 10: before 10.0.19044.6456 — fixed in 10.0.19044.6456
Microsoft Windows 10: before 10.0.19045.6456 — fixed in 10.0.19045.6456
Microsoft Windows 11: before 10.0.22621.6060 — fixed in 10.0.22621.6060
Microsoft Windows 11: through 10.0.22631.6060
Microsoft Windows 11: before 10.0.26100.6899 — fixed in 10.0.26100.6899
Microsoft Windows 11 25H2: before 10.0.26200.6899 — fixed in 10.0.26200.6899
Microsoft Windows Server 2025: through 10.0.26100.6899
Microsoft Windows 10: from 10.0.19044.0 before 10.0.19044.6456 — fixed in 10.0.19044.6456
Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.6456 — fixed in 10.0.19045.6456
Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.6060 — fixed in 10.0.22621.6060
Microsoft Windows 11 version 22H3: from 10.0.22631.0 before 10.0.22631.6060 — fixed in 10.0.22631.6060
Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.6060 — fixed in 10.0.22631.6060
Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.6899 — fixed in 10.0.26100.6899
Microsoft Windows 11 25H2: from 10.0.26200.0 before 10.0.26200.6899 — fixed in 10.0.26200.6899
Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.6899 — fixed in 10.0.26100.6899

How to fix

Upgrade to a fixed version: Microsoft Windows 10 10.0.19044.6456; Microsoft Windows 10 10.0.19045.6456; Microsoft Windows 11 10.0.22621.6060; Microsoft Windows 11 10.0.26100.6899; Microsoft Windows 11 25H2 10.0.26200.6899; Microsoft Windows 10 10.0.19044.6456; Microsoft Windows 10 10.0.19045.6456; Microsoft Windows 11 10.0.22621.6060; Microsoft Windows 11 version 22H3 10.0.22631.6060; Microsoft Windows 11 10.0.22631.6060; Microsoft Windows 11 10.0.26100.6899; Microsoft Windows 11 25H2 10.0.26200.6899. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53139

Get alerted when CVE-2025-53139 or the next vulnerability affects your stack