Named pipes that can be accessed anonymously must be configured to contain no values.

From Windows 8 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

SV-48069r1_rule Named pipes that can be accessed anonymously must be configured to contain no values.

Vulnerability discussion

Named pipes that can be accessed anonymously provide the potential for gaining unauthorized system access. Pipes are internal system communications processes. They are identified internally by ID numbers that vary between systems. To make access to these processes easier, these pipes are given names that do not vary between systems. This setting controls which of these pipes anonymous users may access.

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Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Network access: Named pipes that can be accessed anonymously" to be defined but containing no entries (blank).

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