CVE-2022-21855: Microsoft Exchange Server Remote Code Execution Vulnerability
Published Jan 11, 2022
·Updated
Microsoft Exchange Server Remote Code Execution Vulnerability. This CVE ID is unique from CVE-2022-21846, CVE-2022-21969.
Affected Software
10 affected componentsFixes available
Microsoft Exchange Server 2016=21
Microsoft Exchange Server 2016=22
Microsoft Exchange Server 2013=23
Microsoft Exchange Server 2019=11
Microsoft Exchange Server 2019=10
Microsoft Exchange server=2013-cumulative_update_23
Microsoft Exchange server=2016-cumulative_update_21
Microsoft Exchange server=2016-cumulative_update_22
Microsoft Exchange server=2019-cumulative_update_10
Microsoft Exchange server=2019-cumulative_update_11
Remediation
Event History
Jan 11, 2022
CVE Published
via Microsoft·08:00 AM
Data Sourced
via Microsoft·08:00 AM
DescriptionSeverityWeakness
CVE Published
via MITRE·08:22 PM
Data Sourced
via MITRE·08:22 PM
DescriptionSeverity
Frequently Asked Questions
1
What is CVE-2022-21855?
CVE-2022-21855 is a remote code execution vulnerability in Microsoft Exchange Server.
2
How severe is CVE-2022-21855?
CVE-2022-21855 has a severity rating of 9 out of 10, which is considered critical.
3
Which versions of Microsoft Exchange Server are affected by CVE-2022-21855?
CVE-2022-21855 affects Microsoft Exchange Server 2013 (Cumulative Update 23), Microsoft Exchange Server 2016 (Cumulative Update 21 and 22), and Microsoft Exchange Server 2019 (Cumulative Update 10 and 11).
4
How can I fix CVE-2022-21855?
To fix CVE-2022-21855, you need to install the appropriate security update provided by Microsoft.
5
Where can I find more information about CVE-2022-21855?
You can find more information about CVE-2022-21855 on the Microsoft Security Response Center website.