Executive brief
A security vulnerability has been identified in the Windows Remote Access Connection Manager, a component that handles network and VPN connections. An attacker with basic user access to the network could exploit this flaw to gain higher-level administrative privileges on a target system. This could allow an unauthorized individual to take full control of affected computers, potentially leading to data theft or further network compromise.
Technical details
This vulnerability is classified as a Use-After-Free (CWE-416) within the Windows Remote Access Connection Manager (rasman.dll). The flaw is reachable over the network and requires low-privileged authentication (PR:L). By sending specially crafted requests to the service, an attacker can trigger memory corruption to execute arbitrary code or gain SYSTEM-level privileges. The vulnerability affects multiple versions of Windows 10, Windows 11, and Windows Server 2012 R2. Microsoft has released security updates to address this issue; users should apply the latest cumulative updates for their respective OS versions.
Affected products
- Microsoft Windows 10 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 24H2, 25H2, 26H1
- Microsoft Windows Server 2012 R2 All versions
Timeline
- 2026-07-14: disclosed
- 2026-07-14: advisory