CVE-2021-1637: Windows DNS Query Information Disclosure Vulnerability
First published: Tue Jan 12 2021(Updated: )
Windows DNS Query Information Disclosure Vulnerability
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows Server | =2004 | |
| Microsoft Windows Server | =1909 | |
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server | =20H2 | |
| Microsoft Windows RT | ||
| Microsoft Windows 8.1 | ||
| Microsoft Windows 8.1 | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | ||
| Windows 10 | ||
| Windows 10 | =20h2 | |
| Windows 10 | =1607 | |
| Windows 10 | =1803 | |
| Windows 10 | =1809 | |
| Windows 10 | =1909 | |
| Windows 10 | =2004 | |
| Microsoft Windows | ||
| Microsoft Windows RT | ||
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | =20h2 | |
| Microsoft Windows Server 2016 | =1909 | |
| Microsoft Windows Server 2016 | =2004 | |
| Windows 10 | =20H2 | |
| Windows 10 | =20H2 | |
| Windows 10 | =1803 | |
| Windows 10 | =1809 | |
| Windows 10 | =1809 | |
| Windows 10 | =1809 | |
| Windows 10 | =1607 | |
| Windows 10 | =1607 | |
| Windows 10 | =1909 | |
| Windows 10 | =1909 | |
| Windows 10 | =1909 | |
| Windows 10 | ||
| Windows 10 | =1803 | |
| Windows 10 | =1803 | |
| Windows 10 | ||
| Windows 10 | =2004 | |
| Windows 10 | =2004 | |
| Windows 10 | =2004 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-1637?
CVE-2021-1637 has a moderate severity rating as it leads to information disclosure in Windows DNS queries.
How do I fix CVE-2021-1637?
To fix CVE-2021-1637, install the latest security updates provided by Microsoft for your affected Windows versions.
Which versions of Windows are affected by CVE-2021-1637?
CVE-2021-1637 affects multiple versions of Windows 10, Windows Server, and Windows 8.1, particularly various builds from 1803 to 20H2.
Can exploiting CVE-2021-1637 allow remote access to my system?
Exploiting CVE-2021-1637 does not provide remote access but may allow unauthorized users to obtain sensitive information.
Is there a workaround for CVE-2021-1637 if I cannot apply the update immediately?
There are no documented workarounds for CVE-2021-1637; applying the update is the recommended action.
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