CVE-2026-20852

Windows Hello Tampering Vulnerability

CVSS 7.7 HIGHEPSS 0.5%CWE-266

Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C

Affected products

Microsoft · Windows 10 Version 1607 Microsoft · Windows 10 Version 1809 Microsoft · Windows 10 Version 21H2 Microsoft · Windows 10 Version 22H2 Microsoft · Windows 11 version 22H3 Microsoft · Windows 11 Version 23H2 Microsoft · Windows 11 Version 24H2 Microsoft · Windows 11 Version 25H2 Microsoft · Windows Server 2016 Microsoft · Windows Server 2016 (Server Core installation)Microsoft · Windows Server 2019 Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022 Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft · Windows Server 2025 Microsoft · Windows Server 2025 (Server Core installation)

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References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20852