CVE-2026-50459: CWE-416: Use After Free in Microsoft Windows 10 Version 21H2
CVE-2026-50459 is a use-after-free vulnerability in the Windows Kernel affecting Windows 10 Version 21H2 (build 10.0.19044.0). This flaw allows a local unauthorized attacker to elevate privileges on the affected system. The vulnerability has a high severity score and has been officially fixed by Microsoft.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-50459) involves a use-after-free condition in the Windows Kernel of Windows 10 Version 21H2 (build 10.0.19044.0). Exploitation of this flaw enables a local attacker without privileges to elevate their privileges, potentially gaining higher system rights. Microsoft has released an official fix addressing this issue. The CVSS v3.1 base score is 7.0, reflecting high impact on confidentiality, integrity, and availability, with attack vector local and requiring high attack complexity and user interaction.
Potential Impact
Successful exploitation allows an unauthorized local attacker to elevate privileges, potentially gaining administrative control over the affected system. This can lead to full system compromise, including unauthorized access to sensitive data and disruption of system operations.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50459 to remediate this vulnerability.
CVE-2026-50459: CWE-416: Use After Free in Microsoft Windows 10 Version 21H2
Description
CVE-2026-50459 is a use-after-free vulnerability in the Windows Kernel affecting Windows 10 Version 21H2 (build 10.0.19044.0). This flaw allows a local unauthorized attacker to elevate privileges on the affected system. The vulnerability has a high severity score and has been officially fixed by Microsoft.
CVSS v3.1
Score 7.0high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-50459) involves a use-after-free condition in the Windows Kernel of Windows 10 Version 21H2 (build 10.0.19044.0). Exploitation of this flaw enables a local attacker without privileges to elevate their privileges, potentially gaining higher system rights. Microsoft has released an official fix addressing this issue. The CVSS v3.1 base score is 7.0, reflecting high impact on confidentiality, integrity, and availability, with attack vector local and requiring high attack complexity and user interaction.
Potential Impact
Successful exploitation allows an unauthorized local attacker to elevate privileges, potentially gaining administrative control over the affected system. This can lead to full system compromise, including unauthorized access to sensitive data and disruption of system operations.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50459 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-04T18:59:17.977Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50459","vendor":"Microsoft"}]
Threat ID: 6a5676a268715ace43f09508
Added to database: 07/14/2026, 17:49:22 UTC
Last enriched: 07/14/2026, 23:19:51 UTC
Last updated: 07/14/2026, 23:19:51 UTC
Views: 3
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