| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| Improper authentication in Windows Storage allows an authorized attacker to elevate privileges locally. |
| Null pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally. |
| Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network. |
| Protection mechanism failure in MSHTML Framework allows an unauthorized attacker to bypass a security feature over a network. |
| Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally. |
| Heap-based buffer overflow in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally. |
| Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Connected Devices Platform Service allows an authorized attacker to elevate privileges locally. |
| Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally. |
| Use after free in Windows Subsystem for Linux allows an authorized attacker to elevate privileges locally. |
| Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally. |
| Improper input validation in Windows Hyper-V allows an authorized attacker to execute code locally. |
| 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. |
| Deserialization of untrusted data in Windows System Image Manager allows an authorized attacker to execute code 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>
|
| 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. |
