Product:
Windows Win32K – GRFX
Summary
Heap-based buffer overflow in Windows Win32K – GRFX allows an authorized attacker to execute code locally. This vulnerability can lead to significant impacts on confidentiality, integrity, and availability. Attackers with low privileges can exploit this issue without user interaction.
Details
| Severity | Base Score | CVE |
|---|---|---|
| HIGH | 8.8 | CVE-2026-40403 |
Exploitation
To exploit this vulnerability, an attacker must have local access to the affected system. By leveraging the heap-based buffer overflow, the attacker can execute arbitrary code with the privileges of the user running the application. This can lead to unauthorized access and control over the system.
Affected Products
- Windows Win32K – GRFX: Affected by a heap-based buffer overflow that allows local code execution.
Mitigation
To mitigate this vulnerability, users should ensure that their systems are updated with the latest security patches from Microsoft. Regularly applying updates and following best security practices can help reduce the risk of exploitation.