Executive brief
A security vulnerability exists in the Windows Routing and Remote Access Service (RRAS), a component used to provide routing and VPN services. An attacker who already has basic access to a computer could exploit this flaw to gain higher-level administrative privileges. This could allow them to take full control of the affected system, potentially leading to data theft or further network compromise.
Technical details
This vulnerability is classified as a missing authentication for a critical function (CWE-306) within the Windows Routing and Remote Access Service (RRAS). The flaw allows an attacker with low-privileged local access to execute functions that should require higher authorization, leading to local privilege escalation (LPE). The attack vector is local, requiring no user interaction and having low complexity. Microsoft has released security updates to address this issue across multiple versions of Windows 10, Windows 11, and Windows Server 2012.
Affected products
- Microsoft Windows 10 Versions 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 Versions 24H2, 25H2, 26H1
- Microsoft Windows Server 2012 All versions including Server Core
Timeline
- 2026-07-14: advisory: Initial advisory published by Microsoft and NVD.
- 2026-07-14: patched: Security updates made available via Microsoft Update Guide.