Executive brief
A security vulnerability exists in the Windows Win32K component, which handles graphics and window management. An attacker who already has basic access to a computer could exploit this flaw to view sensitive information that should normally be protected. While this does not allow an attacker to take over the system or delete files, it could lead to the exposure of private data or system configuration details.
Technical details
An information disclosure vulnerability (CWE-200) exists in the Windows Win32K kernel-mode driver. The flaw allows an authenticated attacker with local access to the system to disclose sensitive information. The attack vector is local, meaning the attacker must be able to execute code on the target machine, though no administrative privileges or user interaction are required. The impact is limited to a loss of confidentiality (Low), with no impact on system integrity or availability. Microsoft has released security updates to address this issue across affected versions of Windows 11 and Windows Server 2025.
Affected products
- Microsoft Windows 11 Version 24H2 10.0.26100.0 to 10.0.26100.8875
- Microsoft Windows 11 Version 25H2 10.0.26200.0 to 10.0.26200.8875
- Microsoft Windows 11 version 26H1 10.0.28000.0 to 10.0.28000.2525
- Microsoft Windows Server 2025 10.0.26100.0 to 10.0.26100.33158
Timeline
- 2026-07-14: disclosed: Initial publication of the CVE record.
- 2026-07-14: advisory: Microsoft released the security update guide.