What is CVE-2021-34453?

CVE-2021-34453 is a Microsoft Exchange Server Denial of Service Vulnerability.

Which software versions are affected by CVE-2021-34453?

Microsoft Exchange Server versions 2016-cumulative_update_21, 2016-cumulative_update_22, 2019-cumulative_update_10, and 2019-cumulative_update_11 are affected by CVE-2021-34453.

What is the severity of CVE-2021-34453?

CVE-2021-34453 has a severity level of 7.5 (high).

How can I fix CVE-2021-34453?

Apply the necessary security patches provided by Microsoft to mitigate the vulnerability in Microsoft Exchange Server.

Where can I find more information about CVE-2021-34453?

You can find more information about CVE-2021-34453 on the Microsoft Security Response Center website: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34453

Vulnerability/
CVE-2021-34453

high

7.5

13/10/2021

4/8/2024

CVE-2021-34453: Microsoft Exchange Server Denial of Service Vulnerability

First published: Wed Oct 13 2021(Updated: )

Microsoft Exchange Server Denial of Service Vulnerability

Credit: secure@microsoft.com secure@microsoft.com

Affected Software	Affected Version	How to fix
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

Remedy

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34453

Never miss a vulnerability like this again

Reference Links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34453

Frequently Asked Questions

What is CVE-2021-34453?
CVE-2021-34453 is a Microsoft Exchange Server Denial of Service Vulnerability.
Which software versions are affected by CVE-2021-34453?
Microsoft Exchange Server versions 2016-cumulative_update_21, 2016-cumulative_update_22, 2019-cumulative_update_10, and 2019-cumulative_update_11 are affected by CVE-2021-34453.
What is the severity of CVE-2021-34453?
CVE-2021-34453 has a severity level of 7.5 (high).
How can I fix CVE-2021-34453?
Apply the necessary security patches provided by Microsoft to mitigate the vulnerability in Microsoft Exchange Server.
Where can I find more information about CVE-2021-34453?
You can find more information about CVE-2021-34453 on the Microsoft Security Response Center website: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34453

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collector/nvd-api
agent/software-canonical-lookup-request
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vendor/microsoft
canonical/microsoft exchange server
version/microsoft exchange server/2016-cumulative_update_21
version/microsoft exchange server/2016-cumulative_update_22
version/microsoft exchange server/2019-cumulative_update_10
version/microsoft exchange server/2019-cumulative_update_11

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