A Windows vulnerability recently patched by Microsoft, registering a CVSS score of 10, could allow attackers instant access to Active Directory.

The vulnerability (CVE-2020-1472) subverts Netlogon cryptography, providing a gateway to an enterprise’s internal network for an intruder to gain Domain Admin status with one click, according to a Secura blog post.

“This flaw allows attackers to impersonate any computer, including the domain controller itself, and execute remote procedure calls on their behalf,” wrote Tom Tervoort, senior security specialist and Ralph Moonen, technical director. “All that is required is for a connection to the Domain Controller to be possible from the attacker’s viewpoint,” they added.

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