Windows 10 21h2
CVE-2026-20817
HIGH
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
AnalysisAI
Windows Error Reporting on Windows 10, Windows 11, and Windows Server 2022 fails to properly validate user privileges, enabling local authenticated users to escalate to system-level access. An attacker with valid credentials can exploit this permission handling flaw to gain full control over the affected system. Currently no patch is available for this high-severity vulnerability (CVSS 7.8).
Technical ContextAI
Affects Windows 10 21H2. Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
RemediationAI
Monitor vendor advisories for a patch.
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