KLA11685
Spoofing vulnerability in Microsoft Exchange Server

A spoofing vulnerability was found in Microsoft Exchange Server. Malicious users can exploit this vulnerability to spoof user interface.

Microsoft Exchange Server 2016 Cumulative Update 15
Microsoft Exchange Server 2019 Cumulative Update 4
Microsoft Exchange Server 2019 Cumulative Update 3
Microsoft Exchange Server 2016 Cumulative Update 14

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

4540123