CVE-2026-34347: 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-2026-34347) involves a use-after-free condition in the Windows Win32K graphics (GRFX) subsystem on Windows 10 Version 1607. Exploitation requires local access with some privileges and can lead to elevation of privileges, allowing an attacker to gain higher system rights. The vulnerability has been assigned a CVSS v3.1 base score of 7.0, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation enables a local attacker with authorized access to elevate their privileges, potentially gaining full control over the affected system. This can compromise system confidentiality, integrity, and availability.
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-2026-34347 to remediate this vulnerability.
CVE-2026-34347: 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 7.0high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-34347) involves a use-after-free condition in the Windows Win32K graphics (GRFX) subsystem on Windows 10 Version 1607. Exploitation requires local access with some privileges and can lead to elevation of privileges, allowing an attacker to gain higher system rights. The vulnerability has been assigned a CVSS v3.1 base score of 7.0, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation enables a local attacker with authorized access to elevate their privileges, potentially gaining full control over the affected system. This can compromise system confidentiality, integrity, and availability.
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-2026-34347 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-03-26T21:02:16.447Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34347","vendor":"Microsoft"}]
Threat ID: 6a036540cbff5d861008c493
Added to database: 05/12/2026, 17:37:04 UTC
Last enriched: 06/19/2026, 17:33:22 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 67
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