Kaspersky Threats

Detect date

?

03/02/2021

Severity

?

Critical

Description

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

Exploitation

This vulnerability can be exploited by the following malware:

https://threats.kaspersky.com/en/threat/Exploit.Script.CVE-2021-26855/

Public exploits exist for this vulnerability.

Affected products

Microsoft Exchange Server 2019 Cumulative Update 8
Microsoft Exchange Server 2013 Cumulative Update 23
Microsoft Exchange Server 2016 Cumulative Update 18
Microsoft Exchange Server 2010 Service Pack 3
Microsoft Exchange Server 2016 Cumulative Update 19
Microsoft Exchange Server 2019 Cumulative Update 7

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-2021-26412
CVE-2021-26855
CVE-2021-27078
CVE-2021-27065
CVE-2021-26854
CVE-2021-26857
CVE-2021-26858

Impacts

?

ACE

[?]

Detect date ?	03/02/2021
Severity ?	Critical
Description	Remote code execution vulnerabilities were found in Microsoft Exchange Server. Malicious users can exploit this vulnerability to execute arbitrary code.
Exploitation	This vulnerability can be exploited by the following malware: https://threats.kaspersky.com/en/threat/Exploit.Script.CVE-2021-26855/ Public exploits exist for this vulnerability.
Affected products	Microsoft Exchange Server 2019 Cumulative Update 8 Microsoft Exchange Server 2013 Cumulative Update 23 Microsoft Exchange Server 2016 Cumulative Update 18 Microsoft Exchange Server 2010 Service Pack 3 Microsoft Exchange Server 2016 Cumulative Update 19 Microsoft Exchange Server 2019 Cumulative Update 7
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-2021-26412 CVE-2021-26855 CVE-2021-27078 CVE-2021-27065 CVE-2021-26854 CVE-2021-26857 CVE-2021-26858
Impacts ?	ACE [?]
Related products	Microsoft Exchange Server
CVE-IDS ?	CVE-2021-264126.5High CVE-2021-268557.5Critical CVE-2021-270786.5High CVE-2021-270656.8High CVE-2021-268546.5High CVE-2021-268576.8High CVE-2021-268586.8High
KB list	5000871 5000978
Microsoft official advisories	Microsoft Security Update Guide
	Find out the statistics of the vulnerabilities spreading in your region

KLA12103ACE vulnerabilities in Microsoft Exchange Server

KLA12103
ACE vulnerabilities in Microsoft Exchange Server