CVE-2026-21245— Windows Kernel Elevation of Privilege Vulnerability
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I. Basic Information for CVE-2026-21245
Vulnerability Information
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Vulnerability Title
Windows Kernel Elevation of Privilege Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
Microsoft Windows Kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Kernel是美国微软（Microsoft）公司的Windows操作系统的内核。 Microsoft Windows Kernel存在安全漏洞。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 Core installation),Windows 11 Version 25H2 for ARM64-based Systems,Windows 11 Version 25H2 for x64-based Syste
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 ~ 10.0.26100.7840 | - | |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 ~ 10.0.26200.7840 | - | |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 ~ 10.0.28000.1575 | - | |
| Microsoft | Windows 11 Version 26H1 | 10.0.28000.0 ~ 10.0.28000.1575 | - | |
| Microsoft | Windows Server 2025 | 10.0.26100.0 ~ 10.0.26100.32370 | - | |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 ~ 10.0.26100.32370 | - |
II. Public POCs for CVE-2026-21245
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Microsoft · 2026-02-10 · 54 CVEs total
| CVE-2026-21531 | 9.8 CRITICAL | Azure SDK for Python Remote Code Execution Vulnerability |
| CVE-2026-21537 | 8.8 HIGH | Microsoft Defender for Endpoint Linux Extension Remote Code Execution Vulnerability |
| CVE-2026-21510 | 8.8 HIGH | Windows Shell Security Feature Bypass Vulnerability |
| CVE-2026-21255 | 8.8 HIGH | Windows Hyper-V Security Feature Bypass Vulnerability |
| CVE-2026-21518 | 8.8 HIGH | GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability |
| CVE-2026-21513 | 8.8 HIGH | MSHTML Framework Security Feature Bypass Vulnerability |
| CVE-2026-21516 | 8.8 HIGH | GitHub Copilot for Jetbrains Remote Code Execution Vulnerability |
| CVE-2026-21256 | 8.8 HIGH | GitHub Copilot and Visual Studio Remote Code Execution Vulnerability |
| CVE-2026-21228 | 8.1 HIGH | Azure Local Remote Code Execution Vulnerability |
| CVE-2026-21229 | 8.0 HIGH | Power BI Remote Code Execution Vulnerability |
| CVE-2026-21257 | 8.0 HIGH | GitHub Copilot and Visual Studio Elevation of Privilege Vulnerability |
| CVE-2026-21523 | 8.0 HIGH | GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability |
| CVE-2026-21250 | 7.8 HIGH | Windows HTTP.sys Elevation of Privilege Vulnerability |
| CVE-2026-21533 | 7.8 HIGH | Windows Remote Desktop Services Elevation of Privilege Vulnerability |
| CVE-2026-21514 | 7.8 HIGH | Microsoft Word Security Feature Bypass Vulnerability |
| CVE-2026-21232 | 7.8 HIGH | Windows HTTP.sys Elevation of Privilege Vulnerability |
| CVE-2026-21239 | 7.8 HIGH | Windows Kernel Elevation of Privilege Vulnerability |
| CVE-2026-21238 | 7.8 HIGH | Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability |
| CVE-2026-21231 | 7.8 HIGH | Windows Kernel Elevation of Privilege Vulnerability |
| CVE-2026-21259 | 7.8 HIGH | Microsoft Excel Elevation of Privilege Vulnerability |
Showing top 20 of 54 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Windows 11 Version 24H2
- CVE-2026-33101
Windows Print Spooler Elevation of Privilege Vulnerability - CVE-2026-32223
Windows USB Printing Stack (usbprint.sys) Elevation of Privi - CVE-2026-32221
Windows Graphics Component Remote Code Execution Vulnerabili - CVE-2026-32222
Windows Win32k Elevation of Privilege Vulnerability - CVE-2026-32220
UEFI Secure Boot Security Feature Bypass Vulnerability
Same vendor: Microsoft
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Azure DevOps Information Disclosure Vulnerability - CVE-2026-35428
Azure Cloud Shell Spoofing Vulnerability - CVE-2026-35435
Azure AI Foundry Elevation of Privilege Vulnerability - CVE-2026-34327
Microsoft Partner Center Spoofing Vulnerability - CVE-2026-33844
Azure Managed Instance for Apache Cassandra Remote Code Exec
Same weakness: CWE-122
- CVE-2026-8261
Squirrel sqobject.cpp Load heap-based overflow - CVE-2026-8213
OSGeo gdal Grid File GDapi.c GDSDfldsrch heap-based overflow - CVE-2026-8212
OSGeo gdal SWapi.c SWSDfldsrch heap-based overflow - CVE-2026-42309
Pillow: Heap buffer overflow with nested list coordinates - CVE-2026-45130
Vim: Heap Buffer Overflow in spell file loading
V. Comments for CVE-2026-21245
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