The built-in guest account has not been renamed.

From Windows 2003 Domain Controller Security Technical Implementation Guide

Associated with IA controls: IAAC-1

SV-29483r1_rule The built-in guest account has not been renamed.

Vulnerability discussion

A system faces an increased vulnerability threat if the built-in guest account is not renamed or disabled. The built-in guest account is a known user account on all Windows systems, and as initially installed, does not require a password. This can allow access to system resources by unauthorized users. This account is a member of the group Everyone and has all the rights and permissions associated with that group and could provide access to system resources to unauthorized users.

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Fix text

Configure the system to rename the built-in guest account

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