CVE-2021-40444: Microsoft MSHTML Remote Code Execution Vulnerability
First published: Wed Sep 15 2021(Updated: )
Microsoft MSHTML contains a unspecified vulnerability that allows for remote code execution.
Credit: secure@microsoft.com secure@microsoft.com secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft MSHTML | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | =20h2 | |
| Microsoft Windows 10 | =21h1 | |
| Microsoft Windows 10 | =1607 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows 8.1 | ||
| Microsoft Windows RT | ||
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =r2-sp1 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | =20h2 | |
| Microsoft Windows Server 2016 | =2004 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2022 | ||
| Microsoft Windows 10 | <10.0.10240.19060 | |
| Microsoft Windows 10 | <10.0.14393.4651 | |
| Microsoft Windows 10 | <10.0.17763.2183 | |
| Microsoft Windows 10 | <10.0.18363.1801 | |
| Microsoft Windows 10 | <10.0.19041.1237 | |
| Microsoft Windows 10 | <10.0.19042.1237 | |
| Microsoft Windows 10 | <10.0.19043.1237 | |
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows 8.1 | ||
| Microsoft Windows Server 2004 | <10.0.19041.1237 | |
| Microsoft Windows Server 2016 | <10.0.14393.4651 | |
| Microsoft Windows Server 2019 | <10.0.17763.2183 | |
| Microsoft Windows Server 2022 | <10.0.20348.230 | |
| Microsoft Windows Server 20H2 | <10.0.19042.1237 |
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Reference Links
- http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html
- http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444
- https://www.bleepingcomputer.com/news/security/windows-mshtml-zero-day-used-in-malware-attacks-for-over-a-year/
- https://nvd.nist.gov/vuln/detail/CVE-2021-40444
Frequently Asked Questions
What is CVE-2021-40444?
CVE-2021-40444 is a Microsoft MSHTML Remote Code Execution Vulnerability.
What is the severity of CVE-2021-40444?
The severity of CVE-2021-40444 is high with a CVSS score of 7.8.
Which software is affected by CVE-2021-40444?
Microsoft MSHTML and various versions of Microsoft Windows 10, Windows 7, Windows 8.1, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows Server 2016, Windows Server 2019, and Windows Server 2022 are affected by CVE-2021-40444.
How can I fix CVE-2021-40444?
Apply the security updates provided by Microsoft to fix CVE-2021-40444.
Where can I find more information about CVE-2021-40444?
You can find more information about CVE-2021-40444 at the following references: http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html, http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html, http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html
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