Hi,
“KB4012598” you had mentioned might indicate “Microsoft Security Bulletin MS17-010 – Critical”.
This security update includes many different KB numbers, each OS version has its own appropriate KB number. MS17-010 a generic name of these KBs.
For Windows Vista and Windows Server 2008, it is KB 4012598. For Windows 7 and Windows Server 2008 R2, it is KB 4012212(security only) or KB 4012215(monthly rollup). And etc.
You may reference “
Microsoft Security Bulletin MS17-010 - Critical” for detail information:
https://technet.microsoft.com/library/security/MS17-010
Best Regards,
Eve Wang
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