KLA12137 Multiple vulnerabilities in Microsoft Exchange Server

Detect date:

04/13/2021

Severity:

Critical

Description:

Remote code execution vulnerabilities were found in Microsoft Exchange Server. Malicious users can exploit this vulnerability to execute arbitrary code.

Exploitation:

Public exploits exist for this vulnerability.

Affected products:

Microsoft Exchange Server 2013 Cumulative Update 23
Microsoft Exchange Server 2016 Cumulative Update 20
Microsoft Exchange Server 2019 Cumulative Update 9
Microsoft Exchange Server 2016 Cumulative Update 19
Microsoft Exchange Server 2019 Cumulative Update 8

Solution:

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

Original advisories:

CVE-2021-28480
CVE-2021-28482
CVE-2021-28483
CVE-2021-28481

Impacts:

ACE

Related products:

Microsoft Exchange Server

CVE-IDS:

CVE-2021-284809.8Critical
CVE-2021-284828.8Critical
CVE-2021-284839.0Critical
CVE-2021-284819.8Critical

KB list:

5001779

Microsoft official advisories: