<p>Homeland Security&#8217;s researchers have issued a rare emergency alert to government departments after the discovery of a critical vulnerability in Microsoft Windows Server versions.</p>
<p><img class="alignnone wp-image-3331 size-full" title="emergency alert over Windows bug" src="https://www.wincert.net/wp-content/uploads/2019/09/hacked_image.jpg" alt="emergency alert over Windows bug" width="640" height="415" /></p>
<p>The Cybersecurity and Infrastructure Security Agency have instantly issued an alert to all federal departments and agencies instructing them to avoid unacceptable risk and <strong>patch any Windows servers vulnerable to Zerologon attack</strong>.</p>
<p>The <strong>Zerologon</strong> vulnerability that was rated with a maximum severity score of 10/10 could allow an attacker to take control of any workstation or a server on a vulnerable network including domain controllers.</p>
<p>Security researchers from Secura who discovered this vulnerability said it only takes 3 seconds to exploit it.</p>
<p>In order to prevent the exploitation of this bug, Microsoft has released the fix for it back in August. Unfortunately, as this is a rather complex bug, to completely eradicate the issue Microsoft will have to roll out a second patch early next year.</p>