Disgruntled researcher leaks 'BlueHammer' Windows zero-day exploit

A security researcher has publicly released exploit code for an unpatched Windows privilege escalation vulnerability, dubbed "BlueHammer," after reportedly becoming frustrated with Microsoft's response to responsible disclosure. The exploit allows attackers to gain SYSTEM or elevated administrator permissions on affected Windows systems. Microsoft has not yet issued a patch, leaving systems vulnerable to potential widespread exploitation. The leak represents a breakdown in the coordinated vulnerability disclosure process that typically gives vendors time to develop fixes before details become public. Security experts warn that the availability of working exploit code significantly increases the risk of attacks, particularly against enterprise environments where Windows dominates. The incident raises questions about Microsoft's vulnerability handling procedures and the incentives for researchers to follow responsible disclosure norms when dealing with large vendors.