Executive brief
A security vulnerability has been identified in the Windows Remote Procedure Call (RPC) mechanism, a core component that allows different programs to communicate with each other. An attacker with local access to a system could exploit this flaw to view sensitive information that should otherwise be protected. While this does not allow for remote control of the computer, it could lead to the exposure of confidential data or help an attacker plan further actions.
Technical details
An information disclosure vulnerability exists in the Windows Remote Procedure Call (RPC) runtime. The flaw is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). An attacker must have local access to the target system to exploit this vulnerability; however, no special privileges or user interaction are required. Successful exploitation allows the attacker to read sensitive memory or system information, potentially facilitating further compromise. Microsoft has released security updates to address this issue across various versions of Windows and Windows Server.
Affected products
- Microsoft Windows 10 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 22H3, 23H2, 24H2, 25H2
- Microsoft Windows Server 2008 R2 Service Pack 1
Timeline
- 2026-01-13: advisory: Initial disclosure by Microsoft and NVD
- 2026-07-30: other: CPE and affected version records updated by Microsoft