Executive brief
Windows Key Guard is a Windows security component responsible for managing cryptographic key operations. A heap-based buffer overflow in this component could allow an authorized local user to crash the system or execute code with elevated privileges, potentially compromising the security of encrypted data and system integrity.
Technical details
A heap-based buffer overflow vulnerability exists in Microsoft Windows Key Guard, a security component that handles cryptographic key management and protection. The vulnerability requires the attacker to be an authorized local user with limited privileges. By crafting malicious input to trigger the buffer overflow, an attacker can overwrite heap memory and potentially achieve code execution with elevated privileges. The attack vector is local (not network-accessible). Microsoft has released security updates to address this issue.
Affected products
- Microsoft Windows <UNKNOWN>
Timeline
- 2026-08-11: disclosed