Executive brief
Windows Credential Providers are the authentication mechanisms that handle user login and credential verification on Windows systems. A heap-based buffer overflow in this component could allow an authorized attacker to execute arbitrary code with elevated privileges, potentially compromising sensitive data or taking control of affected systems across a network.
Technical details
A heap-based buffer overflow vulnerability exists in Windows Credential Providers that can be exploited by an authorized attacker to achieve remote code execution. The vulnerability is reachable over a network and does not require user interaction beyond initial authentication. An authenticated attacker can overflow a heap buffer in the credential processing logic to overwrite adjacent memory and redirect execution flow to malicious code. Microsoft has released patches to address this issue; affected systems should be updated promptly.
Affected products
- Microsoft Windows <UNKNOWN>
Timeline
- 2026-09-08: disclosed