What is the severity of CVE-2021-1691?

CVE-2021-1691 has a severity rating of 'Important' as it can lead to a Denial of Service condition.

What systems are affected by CVE-2021-1691?

CVE-2021-1691 affects multiple versions of Microsoft Windows 10 and Windows Server, including versions 1909, 2004, and 20H2.

How do I fix CVE-2021-1691?

To fix CVE-2021-1691, apply the patches provided by Microsoft for the affected versions of Windows.

Is CVE-2021-1691 a remote vulnerability?

CVE-2021-1691 is classified as a local Denial of Service vulnerability, requiring local access to exploit.

Has CVE-2021-1691 been exploited in the wild?

As of the last update, there are no public reports of CVE-2021-1691 being exploited in the wild.

Vulnerability/
CVE-2021-1691

high

7.7

12/1/2021

19/11/2024

CVE-2021-1691: Windows Hyper-V Denial of Service Vulnerability

First published: Tue Jan 12 2021(Updated: )

Hyper-V Denial of Service Vulnerability This CVE ID is unique from CVE-2021-1692.

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

Affected Software	Affected Version	How to fix
Microsoft Windows 10	=20h2
Microsoft Windows 10	=1909
Microsoft Windows 10	=2004
Microsoft Windows Server 2016	=20h2
Microsoft Windows Server 2016	=1909
Microsoft Windows Server 2016	=2004
Microsoft Windows 10	=2004	fix available externally
Microsoft Windows 10	=1909	fix available externally
Microsoft Windows Server	=20H2	fix available externally
Microsoft Windows Server	=2004	fix available externally
Microsoft Windows Server	=1909	fix available externally

Remedy

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1691

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-1691?
CVE-2021-1691 has a severity rating of 'Important' as it can lead to a Denial of Service condition.
What systems are affected by CVE-2021-1691?
CVE-2021-1691 affects multiple versions of Microsoft Windows 10 and Windows Server, including versions 1909, 2004, and 20H2.
How do I fix CVE-2021-1691?
To fix CVE-2021-1691, apply the patches provided by Microsoft for the affected versions of Windows.
Is CVE-2021-1691 a remote vulnerability?
CVE-2021-1691 is classified as a local Denial of Service vulnerability, requiring local access to exploit.
Has CVE-2021-1691 been exploited in the wild?
As of the last update, there are no public reports of CVE-2021-1691 being exploited in the wild.

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version/microsoft windows server 2016/2004
canonical/microsoft windows server
version/microsoft windows server/20h2
version/microsoft windows server/2004
version/microsoft windows server/1909

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Contact

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Frequently Asked Questions

What is the severity of CVE-2021-1691?
CVE-2021-1691 has a severity rating of 'Important' as it can lead to a Denial of Service condition.
What systems are affected by CVE-2021-1691?
CVE-2021-1691 affects multiple versions of Microsoft Windows 10 and Windows Server, including versions 1909, 2004, and 20H2.
How do I fix CVE-2021-1691?
To fix CVE-2021-1691, apply the patches provided by Microsoft for the affected versions of Windows.
Is CVE-2021-1691 a remote vulnerability?
CVE-2021-1691 is classified as a local Denial of Service vulnerability, requiring local access to exploit.
Has CVE-2021-1691 been exploited in the wild?
As of the last update, there are no public reports of CVE-2021-1691 being exploited in the wild.