HarborGuard / CVE
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HIGHCVE-2026-20804Published Modified CNA microsoft

CVE-2026-20804: Windows Hello Tampering Vulnerability

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

Metrics

CVSS v3.1
7.7
Severity
HIGH
Fixed in
10.0.14393.8783
Affected Products
16

Fix available

10.0.14393.878310.0.17763.827610.0.19044.680910.0.19045.680910.0.20348.464810.0.22631.649110.0.25398.209210.0.26100.762310.0.26100.3223010.0.26200.7623
Patch commits
Affected packages
  • Microsoft / Windows 10 Version 1607
    < 10.0.14393.8783 (from 10.0.14393.0)
  • Microsoft / Windows 10 Version 1809
    < 10.0.17763.8276 (from 10.0.17763.0)
  • Microsoft / Windows 10 Version 21H2
    < 10.0.19044.6809 (from 10.0.19044.0)
  • Microsoft / Windows 10 Version 22H2
    < 10.0.19045.6809 (from 10.0.19045.0)
  • Microsoft / Windows 11 version 22H3
    < 10.0.22631.6491 (from 10.0.22631.0)
  • Microsoft / Windows 11 Version 23H2
    < 10.0.22631.6491 (from 10.0.22631.0)
  • Microsoft / Windows 11 Version 24H2
    < 10.0.26100.7623 (from 10.0.26100.0)
  • Microsoft / Windows 11 Version 25H2
    < 10.0.26200.7623 (from 10.0.26200.0)
  • Microsoft / Windows Server 2016
    < 10.0.14393.8783 (from 10.0.14393.0)
  • Microsoft / Windows Server 2016 (Server Core installation)
    < 10.0.14393.8783 (from 10.0.14393.0)
  • Microsoft / Windows Server 2019
    < 10.0.17763.8276 (from 10.0.17763.0)
  • Microsoft / Windows Server 2019 (Server Core installation)
    < 10.0.17763.8276 (from 10.0.17763.0)
  • Microsoft / Windows Server 2022
    < 10.0.20348.4648 (from 10.0.20348.0)
  • Microsoft / Windows Server 2022, 23H2 Edition (Server Core installation)
    < 10.0.25398.2092 (from 10.0.25398.0)
  • Microsoft / Windows Server 2025
    < 10.0.26100.32230 (from 10.0.26100.0)
  • Microsoft / Windows Server 2025 (Server Core installation)
    < 10.0.26100.32230 (from 10.0.26100.0)
CVSS Vector
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
References