Windows
CVE-2026-20804
HIGH
Severity by source
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
2DescriptionCVE.org
Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.
AnalysisAI
Windows Hello privilege elevation flaw in Windows 10 21h2, Windows Server 2019, 2022, and 2022 23h2 enables local attackers to modify system data without authorization. The vulnerability stems from improper privilege assignment that bypasses access controls, allowing an unauthenticated attacker with local access to tamper with protected resources. Currently no patch is available and exploitation requires only local access with no special conditions or user interaction.
Technical ContextAI
Affects Windows 10 1607. Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.
RemediationAI
Monitor vendor advisories for a patch.
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Same weakness CWE-266 – Incorrect Privilege Assignment
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External POC / Exploit Code
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