Executive brief
A security vulnerability exists in the Windows Push Notification service, which is responsible for delivering app alerts and updates to users. An attacker who already has basic access to a computer could exploit this flaw to view sensitive information they are not authorized to see. This could lead to the exposure of private data contained within notifications or system processes.
Technical details
This vulnerability is classified as an Information Exposure (CWE-200) within the Windows Push Notification component. An attacker must have local access to the target system and be authenticated with low privileges (PR:L) to exploit the flaw. Successful exploitation allows the attacker to disclose sensitive information that should be restricted to other users or the system. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server. Microsoft has released security updates to address this issue.
Affected products
- Microsoft Windows 10 Version 21H2 10.0.19044.0 to 10.0.19044.7548
- Microsoft Windows 10 Version 22H2 10.0.19045.0 to 10.0.19045.7548
- 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 10.0.28000.2269
- Microsoft Windows Server 2022 10.0.20348.0 to 10.0.20348.5386
- Microsoft Windows Server 2025 10.0.26100.0 to 10.0.26100.33158
Timeline
- 2026-07-14: advisory: Initial publication by Microsoft and NVD