Executive brief
Windows DNS is a core networking component used to resolve domain names on Windows servers and infrastructure. A heap-based buffer overflow in this component could allow an authorized attacker with local access to execute arbitrary code with elevated system privileges, potentially compromising the entire server and any systems that depend on its DNS services.
Technical details
The vulnerability is a heap-based buffer overflow in Windows DNS that can be triggered by an authorized local attacker. The attack requires local access and existing authentication credentials on the system. A successful exploit allows the attacker to overflow a heap buffer, leading to memory corruption and arbitrary code execution with elevated privileges. Microsoft has released security updates to patch this vulnerability in affected versions of Windows.
Affected products
- Microsoft Windows DNS <UNKNOWN>
Timeline
- 2026-08-11: disclosed
- 2026-08-11: advisory