No binaries that were included in the original KB2756920 security update have changed. The reoffered KB2756920 update, available through automatic updating, addresses potential compatibility issues by adding the KB2637518 update to the chain installer. The KB2637518 update only applies to configurations with specific non-security updates installed. For more information about these configurations, see Microsoft Knowledge Base Article 2801728.
Note that the KB2756920 update on the Microsoft Download Center has not changed and does not add the KB2637518 update to the chain installer. Customers who manually download and apply the KB2756920 update should consult Microsoft Knowledge Base Article 2801728 if they are experiencing compatibility issues.
Based on this, KB2637518 was released to address this issue. The content was available around 3 hours ago. Patches for Windows (English) site, version 1712. The notification was sent to BESAdmin Announcement email group. It would be great if you can subscribe the notification email group to get latest updates.