Four-Byte Write and Timing Bug Let Researchers Run Code in Windows SmartScreen Enclave

Researchers discovered vulnerabilities in Windows SmartScreen's VBS enclave allowing arbitrary code execution in a protected memory region meant to guard anti-phishing secrets. This bypasses isolation protections designed to prevent compromise even if the rest of Windows is taken over.

https://thehackernews.com/2026/10/four-byte-write-and-timing-bug-let.html