Windows Mark of the Web Security Feature Bypass Vulnerability

Windows has a security feature called 'Mark of the Web' that warns users when they download files from the internet. This vulnerability allows attackers to bypass that warning, making it easier to trick users into running malicious files without seeing the safety alert.

A bypass vulnerability in Windows Mark of the Web mechanism allows threat actors to circumvent the security prompt that typically flags downloaded files. The vulnerability affects the file attribute/stream verification logic, enabling delivery of malicious executables without triggering user warnings under specific file handling conditions.