Executive brief
A security vulnerability has been identified in the Windows Notification service, which manages system and application alerts. An attacker who already has basic access to a computer could exploit this flaw to gain full administrative control over the system. This could allow them to view sensitive data, install malicious software, or disrupt business operations.
Technical details
A vulnerability exists in the Windows Notification component due to incorrect type conversion or casting (CWE-704). The flaw allows a locally authenticated attacker with low privileges to execute code with elevated permissions. The attack vector is local, requiring the attacker to run a specially crafted application on the target system. Successful exploitation results in a complete loss of confidentiality, integrity, and availability (CVSS 7.8). Microsoft has released security updates to address this issue across affected versions of Windows 10, Windows 11, and Windows Server 2016.
Affected products
- Microsoft Windows 10 Versions 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 Versions 24H2, 25H2, 26H1
- Microsoft Windows Server 2016 Standard and Server Core installations
Timeline
- 2026-07-14: disclosed
- 2026-07-14: advisory