CVE-2026-44809— Windows Common Log File System Driver Elevation of Privilege Vulnerability
Quick assessment
Affected
Microsoft Windows 11 Version 24H2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Microsoft Windows Common Log File System Driver是美国微软（Microsoft）公司的通用日志文件系统 (CLFS) API 提供了一个高性能、通用的日志文件子系统，专用客户端应用程序可以使用该子系统并且多个客户端可以共享以优化日志访问。 Microsoft Windows Common Log File System Driver存在资源管理错误漏洞。攻击者利用该漏洞可以提升权限。以下产品和版本受到影响：Windows Server 2025 (Server
Possible ATT&CK Techniques 2 AI
T1203 · Exploitation for Client Execution T1068 · Exploitation for Privilege EscalationAffected Version Matrix 5
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0< 10.0.26100.8655 |
affected |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0< 10.0.26200.8655 |
affected |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0< 10.0.28000.2269 |
affected |
| Microsoft | Windows Server 2025 | 10.0.26100.0< 10.0.26100.32995 |
affected |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0< 10.0.26100.32995 |
affected |
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I. Basic Information for CVE-2026-44809
Vulnerability Information
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Vulnerability Title
Windows Common Log File System Driver Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows Common Log File System Driver 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Common Log File System Driver是美国微软（Microsoft）公司的通用日志文件系统 (CLFS) API 提供了一个高性能、通用的日志文件子系统，专用客户端应用程序可以使用该子系统并且多个客户端可以共享以优化日志访问。 Microsoft Windows Common Log File System Driver存在资源管理错误漏洞。攻击者利用该漏洞可以提升权限。以下产品和版本受到影响：Windows Server 2025 (Server
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 ~ 10.0.26100.8655 | - |
|
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 ~ 10.0.26200.8655 | - |
|
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 ~ 10.0.28000.2269 | - |
|
| Microsoft | Windows Server 2025 | 10.0.26100.0 ~ 10.0.26100.32995 | - |
|
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 ~ 10.0.26100.32995 | - |
|
II. Public POCs for CVE-2026-44809
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-44809 (1)
Same Patch Batch · Microsoft · 2026-06-09 · 200 CVEs total
| CVE-2026-47291 | 9.8 CRITICAL | HTTP.sys Remote Code Execution Vulnerability |
| CVE-2026-26142 | 9.8 CRITICAL | Nuance PowerScribe Remote Code Execution Vulnerability |
| CVE-2026-45657 | 9.8 CRITICAL | Windows Kernel Remote Code Execution Vulnerability |
| CVE-2026-47643 | 9.8 CRITICAL | Azure Stack Edge Remote Code Execution Vulnerability |
| CVE-2026-44815 | 9.8 CRITICAL | DHCP Client Service Remote Code Execution Vulnerability |
| CVE-2026-42904 | 9.6 CRITICAL | Windows TCP/IP Elevation of Privilege Vulnerability |
| CVE-2026-47281 | 9.6 CRITICAL | Visual Studio Code Elevation of Privilege Vulnerability |
| CVE-2026-45602 | 9.1 CRITICAL | Windows Dynamic Host Configuration Protocol (DHCP) Tampering Vulnerability |
| CVE-2026-45484 | 8.8 HIGH | Microsoft SharePoint Elevation of Privilege Vulnerability |
| CVE-2026-47289 | 8.8 HIGH | Remote Desktop Client Remote Code Execution Vulnerability |
| CVE-2026-45648 | 8.8 HIGH | Windows Active Directory Domain Services Remote Code Execution Vulnerability |
| CVE-2026-32193 | 8.8 HIGH | Azure Kubernetes Service (AKS) Remote Code Execution Vulnerability |
| CVE-2026-45504 | 8.8 HIGH | Microsoft Exchange Server Elevation of Privilege Vulnerability |
| CVE-2026-40371 | 8.8 HIGH | Microsoft Dynamics 365 (on-premises) Elevation of Privilege Vulnerability |
| CVE-2026-42985 | 8.8 HIGH | Remote Desktop Client Remote Code Execution Vulnerability |
| CVE-2026-47653 | 8.8 HIGH | Remote Desktop Client Remote Code Execution Vulnerability |
| CVE-2026-45607 | 8.4 HIGH | Windows Hyper-V Remote Code Execution Vulnerability |
| CVE-2026-45458 | 8.4 HIGH | Microsoft Outlook and Word Remote Code Execution Vulnerability |
| CVE-2026-45641 | 8.4 HIGH | Windows Hyper-V Remote Code Execution Vulnerability |
| CVE-2026-45472 | 8.4 HIGH | Microsoft Office Remote Code Execution Vulnerability |
Showing top 20 of 200 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-44809
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