CVE-2021-33742highunder attackCWE-787

CVE-2021-33742: high-severity vulnerability in Microsoft Windows 10 Version 1507

Windows MSHTML Platform Remote Code Execution Vulnerability

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63Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA.

ssvc Actcvss 7.5epss 59%
from disclosure to weapon
Published on NVDJun 8
CISA KEV+148d
Action required by CISAfederal deadline: 2021-11-17

Apply updates per vendor instructions.

In short

A flaw in Windows MSHTML (Internet Explorer's rendering engine) allows attackers to execute arbitrary code on a victim's computer through a specially crafted webpage. This is dangerous because simply visiting a malicious website could compromise your entire system.

Technical detail

Out-of-bounds write vulnerability (CWE-787) in MSHTML engine exploitable via malicious HTML/JavaScript content delivered through web browser. Requires user interaction (visiting malicious page); successful exploitation leads to arbitrary code execution with user privileges.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

Windows MSHTML Platform Remote Code Execution Vulnerability
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Affected products
Microsoft · Windows 10 Version 1507Microsoft · Windows 10 Version 1607Microsoft · Windows 10 Version 1809Microsoft · Windows 10 Version 1909Microsoft · Windows 10 Version 2004Microsoft · Windows 10 Version 20H2Microsoft · Windows 10 Version 21H1Microsoft · Windows 7Microsoft · Windows 7 Service Pack 1Microsoft · Windows 8.1Microsoft · Windows Server 2008 R2 Service Pack 1Microsoft · Windows Server 2008 Service Pack 2Microsoft · Windows Server 2008 Service Pack 2Microsoft · Windows Server 2012Microsoft · Windows Server 2012 R2Microsoft · Windows Server 2016Microsoft · Windows Server 2019
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