Executive brief
A security vulnerability exists in the Windows component responsible for managing network traffic priority (QoS Packet Scheduler). An attacker who already has basic access to a computer could exploit this to view sensitive information that should normally be protected. While this does not allow an attacker to take over the system directly, it could be used to gather data necessary for more complex future attacks.
Technical details
An information disclosure vulnerability exists in the Windows Quality of Service (QoS) Packet Scheduler. The flaw is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). To exploit this, an attacker must first gain local access to the target system with at least low-privileged user rights. Successful exploitation allows the attacker to read sensitive memory or system information that is otherwise restricted. Microsoft has released security updates to address this issue across multiple versions of Windows 10, Windows 11, and Windows Server.
Affected products
- Microsoft Windows 10 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 24H2, 25H2, 26H1
- Microsoft Windows Server 2012 All versions
Timeline
- 2026-07-14: disclosed: Initial disclosure by Microsoft and NVD.
- 2026-07-14: advisory