Executive brief
A security vulnerability has been identified in the Windows Push Notification service, which handles real-time alerts and updates for applications. 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 access sensitive data, install malicious software, or disrupt business operations.
Technical details
A heap-based buffer overflow vulnerability (CWE-122) exists in the Windows Push Notification service. The flaw is triggered when the service improperly handles memory allocation during the processing of notification data. An attacker with low-privileged local access can exploit this by running a specially crafted application to overwrite memory, leading to local privilege escalation (LPE) to SYSTEM level. The attack requires no user interaction. Microsoft has released security updates to address this issue across affected Windows 10, Windows 11, and Windows Server versions.
Affected products
- Microsoft Windows 10 Version 1607 10.0.14393.0 to 10.0.14393.9339
- Microsoft Windows 10 Version 1809 10.0.17763.0 to 10.0.17763.9020
- 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 2012 R2 6.3.9600.0 to 6.3.9600.23291
Timeline
- 2026-07-14: disclosed
- 2026-07-14: advisory