CVE-2026-35417: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1809
Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability, identified as CVE-2026-35417 and classified under CWE-843 (Access of Resource Using Incompatible Type or Type Confusion), affects Windows 10 Version 1809 (build 10.0.17763.0). It is a use-after-free flaw in the Win32K graphics subsystem (GRFX) that could be leveraged by an authorized local attacker to elevate privileges. The CVSS v3.1 base score is 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows a local attacker with authorized access to elevate their privileges on the affected system, potentially gaining higher-level permissions and control. The vulnerability impacts system confidentiality, integrity, and availability at a high level.
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-2026-35417 to remediate this vulnerability.
CVE-2026-35417: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1809
Description
Use after free in Windows Win32K - GRFX 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 2022, 23H2 Edition (Server Core installation)
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 CVE-2026-35417 and classified under CWE-843 (Access of Resource Using Incompatible Type or Type Confusion), affects Windows 10 Version 1809 (build 10.0.17763.0). It is a use-after-free flaw in the Win32K graphics subsystem (GRFX) that could be leveraged by an authorized local attacker to elevate privileges. The CVSS v3.1 base score is 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows a local attacker with authorized access to elevate their privileges on the affected system, potentially gaining higher-level permissions and control. The vulnerability impacts system confidentiality, integrity, and availability at a high level.
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-2026-35417 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-02T19:21:11.804Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35417","vendor":"Microsoft"}]
Threat ID: 6a036547cbff5d861008c639
Added to database: 05/12/2026, 17:37:11 UTC
Last enriched: 08/11/2026, 16:40:19 UTC
Last updated: 09/13/2026, 10:01:30 UTC
Views: 105
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