SQL Server Cumulative Updates - not visible in Windows Update

I just installed all possible Windows updates on WS2008R2/SQL2012 instance. When I run

SELECT @@VERSION

I get

Microsoft SQL Server 2012 - 11.0.5058.0 (X64) 
    May 14 2014 18:34:29 
    Copyright (c) Microsoft Corporation
    Standard Edition (64-bit) on Windows NT 6.1 <X64> (Build 7601: Service Pack 1) (Hypervisor)

According to

http://ift.tt/1mlEDS6

and Microsoft websites, there are 4 Cumulative Updates available for SQL Server 2012 SP2 and the newest build is 11.00.9000.

Why didn't Windows Update get Cumulative Updates too? Should I download and install them manually?