CVE-2026-83942: CWE-862: Missing Authorization in Microsoft Windows 10 Version 1809
Description
Missing authorization in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-862 (Missing Authorization), exists in the Windows Kernel of Windows 10 Version 1809 and other specified builds. It allows an attacker who already has some level of local authorization to elevate their privileges due to insufficient authorization enforcement in the kernel. The CVSS 3.1 base score is 7.8, indicating high severity, with impacts on confidentiality, integrity, and availability. Microsoft has published an official fix for the affected versions.
Potential Impact
An attacker with local access and some authorization can exploit this vulnerability to gain elevated privileges, potentially leading to full system compromise. The vulnerability impacts confidentiality, integrity, and availability of the affected system. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for the affected Windows 10 versions as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83942.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-31T23:40:59.641Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83942","vendor":"Microsoft"}]
Threat ID: 6aa04575acd9273b49fbbb3a
Added to database: 09/08/2026, 17:27:17 UTC
Last enriched: 10/14/2026, 22:11:03 UTC
Last updated: 10/23/2026, 15:10:15 UTC
Views: 30
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