| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally. |
| Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally. |
| <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>
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| This vulnerability is caused by a CWE‑159: "Improper Handling of Invalid Use of Special Elements" weakness, which leads to an unrecoverable inconsistency in the CLFS.sys driver. This condition forces a call to the KeBugCheckEx function, allowing an unprivileged user to trigger a system crash. Microsoft silently fixed this vulnerability in the September 2025 cumulative update for Windows 11 2024 LTSC and Windows Server 2025. Windows 25H2 (released in September) was released with the patch. Windows 1123h2 and earlier versions remain vulnerable. |
| Heap-based buffer overflow in Windows Core Messaging allows an authorized attacker to elevate privileges over a network. |
| Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally. |
| Insertion of sensitive information into log file in Windows NTFS allows an unauthorized attacker to disclose information with a physical attack. |
| Integer overflow or wraparound in Windows Fast FAT Driver allows an unauthorized attacker to execute code locally. |
| Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information locally. |
| Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. |
| Improper neutralization in Microsoft Management Console allows an unauthorized attacker to bypass a security feature locally. |
| Windows PrintWorkflowUserSvc Elevation of Privilege Vulnerability |
| Windows PrintWorkflowUserSvc Elevation of Privilege Vulnerability |
| Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability |
| Microsoft COM for Windows Elevation of Privilege Vulnerability |
| Windows Direct Show Remote Code Execution Vulnerability |
| Active Directory Domain Services Elevation of Privilege Vulnerability |
| Windows Remote Desktop Services Remote Code Execution Vulnerability |
| Windows OLE Remote Code Execution Vulnerability |
| Microsoft DWM Core Library Elevation of Privilege Vulnerability |
