Jun 2021: Windows MSHTML Platform Remote Code Execution Vulnerability
CVE-2021-33742 Published on June 8, 2021

Windows MSHTML Platform Remote Code Execution Vulnerability
Windows MSHTML Platform Remote Code Execution Vulnerability

NVD

Known Exploited Vulnerability

This Microsoft MSHTML Platform Remote Code Execution Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Microsoft MSHTML Remote Code Execution Vulnerability.

The following remediation steps are recommended / required by November 17, 2021: Apply updates per vendor instructions.

Weakness Type

What is a Memory Corruption Vulnerability?

The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.

CVE-2021-33742 has been classified to as a Memory Corruption vulnerability or weakness.

Products Associated with CVE-2021-33742

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-33742 are published in these products:

Microsoft Windows 10

Microsoft Windows 7

Microsoft Windows 8.1

Microsoft Windows Rt 8 1

Microsoft Windows Server 2008

Microsoft Windows Server 2012

Microsoft Windows Server 2016

Microsoft Windows Server 2019

Microsoft Windows 10 1909

Microsoft Windows 10 21h1

Microsoft Windows 10 2004

Microsoft Windows 10 1507

Microsoft Windows Server 2008 Sp2

Microsoft Windows Server 2008 R2

Microsoft Windows Server 2012 R2

Affected Versions

Microsoft Windows 10 Version 1809:

Version 10.0.0 and below 10.0.17763.1999 is affected.

Microsoft Windows Server 2019:

Version 10.0.0 and below 10.0.17763.1999 is affected.

Microsoft Windows 10 Version 1909:

Version 10.0.0 and below 10.0.18363.1621 is affected.

Microsoft Windows 10 Version 21H1:

Version 10.0.0 and below 10.0.19043.1052 is affected.

Microsoft Windows 10 Version 2004:

Version 10.0.0 and below 10.0.19041.1052 is affected.

Microsoft Windows 10 Version 20H2:

Version 10.0.0 and below 10.0.19042.1052 is affected.

Microsoft Windows 10 Version 1507:

Version 10.0.0 and below 10.0.10240.18967 is affected.

Microsoft Windows 10 Version 1607:

Version 10.0.0 and below 10.0.14393.4467 is affected.

Microsoft Windows Server 2016:

Version 10.0.0 and below 10.0.14393.4467 is affected.

Microsoft Windows 7:

Version 6.1.0 and below 6.1.7601.25632 is affected.
Version 6.1.0 and below publication is affected.

Microsoft Windows 7 Service Pack 1:

Version 6.1.0 and below 6.1.7601.25632 is affected.
Version 6.1.0 and below publication is affected.

Microsoft Windows 8.1:

Version 6.3.0 and below 6.3.9600.20045 is affected.
Version 6.3.0 and below 1.0.0.0 is affected.

Microsoft Windows Server 2008 Service Pack 2:

Version 6.0.0 and below 6.0.6003.21137 is affected.
Version 6.0.0 and below publication is affected.

Microsoft Windows Server 2008 Service Pack 2:

Version 6.0.0 and below 6.0.6003.21137 is affected.
Version 6.0.0 and below publication is affected.

Microsoft Windows Server 2008 R2 Service Pack 1:

Version 6.1.0 and below 6.1.7601.25632 is affected.
Version 6.1.0 and below publication is affected.

Microsoft Windows Server 2012:

Version 6.2.0 and below 6.2.9200.23372 is affected.
Version 6.2.0 and below 1.0.0.0 is affected.

Microsoft Windows Server 2012 R2:

Version 6.3.0 and below 6.3.9600.20045 is affected.
Version 6.3.0 and below 1.0.0.0 is affected.

Exploit Probability

EPSS

71.00%

Percentile

98.67%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.