CVE-2026-34333: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-34333) involves a use-after-free condition in the Windows Win32K graphics subsystem (GRFX) on Windows 10 Version 1607. Exploitation requires local access with some privileges and does not require user interaction. Successful exploitation could lead to elevation of privileges, granting the attacker higher-level permissions on the system. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate their privileges, potentially gaining higher system rights. This could allow the attacker to execute code with elevated permissions, compromise system integrity, and bypass security controls. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34333 to remediate this vulnerability.
CVE-2026-34333: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-34333) involves a use-after-free condition in the Windows Win32K graphics subsystem (GRFX) on Windows 10 Version 1607. Exploitation requires local access with some privileges and does not require user interaction. Successful exploitation could lead to elevation of privileges, granting the attacker higher-level permissions on the system. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate their privileges, potentially gaining higher system rights. This could allow the attacker to execute code with elevated permissions, compromise system integrity, and bypass security controls. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34333 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-03-26T21:02:16.445Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34333","vendor":"Microsoft"}]
Threat ID: 6a03653ccbff5d861008c3e2
Added to database: 05/12/2026, 17:37:00 UTC
Last enriched: 06/19/2026, 17:32:17 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 82
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