KLA10873
Multiple vulnerabilities in Microsoft Exchange Server

Multiple serious vulnerabilities have been found in Microsoft Exchange Server. Malicious users can exploit these vulnerabilities to spoof user interface. obtain sensitive information or gain privileges.

Below is a complete list of vulnerabilities

1. An improper email messages parsing can be exploited remotely via a specially designed email to obtain sensitive information;
2. An improper open redirect handling can be exploited remotely via a specially designed URL to spoof user interface;
3. An improper meeting invitation handling can be exploited remotely via a specially designed Outlook meeting to gain privileges.

Microsoft Exchange Server 2007 Service Pack 3
Microsoft Exchange Server 2010 Service Pack 3
Microsoft Exchange Server 2013 Service Pack 1, Cumulative Update 12 or Cumulative Update 13
Microsoft Exchange Server 2016 Cumulative Update 1 or cumulative update 2

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