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CVE-2021-40444

גבוהה 8.8 מנוצלת בשטח (KEV) בשימוש בכופרה

ניצול פעיל מאומת — קטלוג CISA KEV

שם
Microsoft MSHTML Remote Code Execution Vulnerability
נוסף לקטלוג
יעד טיפול (פדרלי)
פעולה נדרשת
Apply updates per vendor instructions.

תיאור (מקור, אנגלית)

<p>Microsoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft Windows. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability by using specially-crafted Microsoft Office documents.</p> <p>An attacker could craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine. The attacker would then have to convince the user to open the malicious document. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.</p> <p>Microsoft Defender Antivirus and Microsoft Defender for Endpoint both provide detection and protections for the known vulnerability. Customers should keep antimalware products up to date. Customers who utilize automatic updates do not need to take additional action. Enterprise customers who manage updates should select the detection build 1.349.22.0 or newer and deploy it across their environments. Microsoft Defender for Endpoint alerts will be displayed as: “Suspicious Cpl File Execution”.</p> <p>Upon completion of this investigation, Microsoft will take the appropriate action to help protect our customers. This may include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs.</p> <p>Please see the <strong>Mitigations</strong> and <strong>Workaround</strong> sections for important information about steps you can take to protect your system from this vulnerability.</p> <p><strong>UPDATE</strong> September 14, 2021: Microsoft has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. Please see the FAQ for important information about which updates are applicable to your system.</p>

מדדים

CVSS 3.1
8.8 (HIGH) מקור הציון: CNA CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L
EPSS — סבירות ניצול
97% (אחוזון 100) נכון ל-25/7/2026
CWE
CWE-22

מוצרים מושפעים

microsoft: windows 10 1507; microsoft: windows 10 1607; microsoft: windows 10 1809; microsoft: windows 10 1909; microsoft: windows 10 2004; microsoft: windows 10 20h2; microsoft: windows 10 21h1; microsoft: windows 7; microsoft: windows 8.1; microsoft: windows rt 8.1; microsoft: windows server 2004; microsoft: windows server 2008; microsoft: windows server 2012; microsoft: windows server 2016; microsoft: windows server 2019

קישורים