CVE-2026-50423: CWE-284: Improper Access Control in Microsoft Windows 10 Version 21H2
CVE-2026-50423 is a high-severity vulnerability in Microsoft Windows 10 Version 21H2 involving improper access control in the Windows Kernel. It allows an authorized local attacker to elevate privileges. An official fix is available from Microsoft.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-50423) is due to improper access control in the Windows Kernel of Windows 10 Version 21H2 (build 10.0.19044.0). It enables a local attacker with some level of authorization to escalate privileges, potentially gaining higher system rights. The CVSS v3.1 base score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. Microsoft has published an official fix for this issue as detailed in their security update guide.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges on the affected system, potentially gaining full control over the Windows 10 Version 21H2 environment. This can lead to complete compromise of confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as referenced in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50423 to remediate this vulnerability.
CVE-2026-50423: CWE-284: Improper Access Control in Microsoft Windows 10 Version 21H2
Description
CVE-2026-50423 is a high-severity vulnerability in Microsoft Windows 10 Version 21H2 involving improper access control in the Windows Kernel. It allows an authorized local attacker to elevate privileges. An official fix is available from Microsoft.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-50423) is due to improper access control in the Windows Kernel of Windows 10 Version 21H2 (build 10.0.19044.0). It enables a local attacker with some level of authorization to escalate privileges, potentially gaining higher system rights. The CVSS v3.1 base score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. Microsoft has published an official fix for this issue as detailed in their security update guide.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges on the affected system, potentially gaining full control over the Windows 10 Version 21H2 environment. This can lead to complete compromise of confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft as referenced in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50423 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-04T18:56:53.259Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50423","vendor":"Microsoft"}]
Threat ID: 6a56769d68715ace43f09415
Added to database: 07/14/2026, 17:49:17 UTC
Last enriched: 07/14/2026, 23:47:52 UTC
Last updated: 07/14/2026, 23:47:52 UTC
Views: 3
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