Experts published unpatched Windows zero-day BlueHammer

A Windows zero-day vulnerability, known as BlueHammer, has been publicly disclosed by a researcher, allowing attackers to escalate privileges and gain SYSTEM or admin rights. The flaw, which was initially reported to Microsoft, remains unpatched, leaving users vulnerable to potential exploits. The researcher, who published the exploit on GitHub under the alias Nightmare-Eclipse, criticized Microsoft's Security Response Center for its handling of the disclosure process. As a result, the BlueHammer exploit is now publicly available, putting pressure on Microsoft to release a patch as soon as possible¹. The public disclosure of this zero-day vulnerability highlights the importance of prompt patching and vulnerability management, as the window for mitigation is rapidly shrinking. This incident underscores the need for organizations to assess their exposure to BlueHammer immediately, as the absence of a patch leaves them susceptible to attacks.