Executive brief
Windows Distributed File System (DFS) is a core Windows feature that enables users to access files across multiple networked servers transparently. A heap-based buffer overflow in DFS allows authorized users to execute arbitrary code with elevated privileges on affected systems. This could enable an attacker with local access to gain system-level control, potentially compromising entire network file sharing infrastructure and sensitive data.
Technical details
A heap-based buffer overflow vulnerability exists in the Windows Distributed File System (DFS) component. The vulnerability can be exploited by an authenticated local attacker to achieve privilege escalation. The attack requires the attacker to already have authorized access to the system. Successful exploitation allows the attacker to execute arbitrary code with elevated (SYSTEM) privileges. Microsoft has released security updates to address this vulnerability.
Affected products
- Microsoft Windows
Timeline
- 2026-09-08: disclosed