We recommend that you install these updates immediately. Please see the Security Updates table for the applicable update for your system. UPDATE September 14, 2021: Microsoft has released security updates to address this vulnerability. Please see the Mitigations and Workaround sections for important information about steps you can take to protect your system from this vulnerability. This may include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs. Upon completion of this investigation, Microsoft will take the appropriate action to help protect our customers. Microsoft Defender for Endpoint alerts will be displayed as: “Suspicious Cpl File Execution”. Enterprise customers who manage updates should select the detection build 1.349.22.0 or newer and deploy it across their environments. Customers who utilize automatic updates do not need to take additional action. Customers should keep antimalware products up to date. Microsoft Defender Antivirus and Microsoft Defender for Endpoint both provide detection and protections for the known vulnerability. 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. The attacker would then have to convince the user to open the malicious document. An attacker could craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability by using specially-crafted Microsoft Office documents. Microsoft ActiveX Remote Code Execution VulnerabilityĪ vulnerability has been identified in SIMATIC NET PC Software V14 (All versions), SIMATIC NET PC Software V15 (All versions), SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions), SIMATIC PCS 7 V9.1 (All versions), SIMATIC WinCC (All versions Microsoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft Windows.
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