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CVE-2025-21333— Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft Windows 10 Version 21H2
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Hyper-V是美国微软（Microsoft）公司的一个应用程序。一种系统管理程序虚拟化技术，能够实现桌面虚拟化。 Microsoft Hyper-V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 10 Version 21H2 for x64-based Systems,Windows 11 Version 22H2 for ARM64-based Systems,Windows 11 Version 22H2 for x64-based Syst

CVSS 7.8 · High KEV EPSS 9.99% · P95

Public Exploits 1

ExploitDB · 1 EDB-52436 [local]

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 9

VendorProduct Version RangeStatus
Microsoft Windows 10 Version 21H2 10.0.19044.0< 10.0.19044.5371 affected
Microsoft Windows 10 Version 22H2 10.0.19045.0< 10.0.19045.5371 affected
Microsoft Windows 11 version 22H2 10.0.22621.0< 10.0.22621.4751 affected
Microsoft Windows 11 version 22H3 10.0.22631.0< 10.0.22631.4751 affected
Microsoft Windows 11 Version 23H2 10.0.22631.0< 10.0.22631.4751 affected
Microsoft Windows 11 Version 24H2 10.0.26100.0< 10.0.26100.2894 affected
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0< 10.0.25398.1369 affected
Microsoft Windows Server 2025 10.0.26100.0< 10.0.26100.2894 affected
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0< 10.0.26100.2894 affected
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I. Basic Information for CVE-2025-21333

Vulnerability Information
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Vulnerability Title
Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
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
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Hyper-V 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Hyper-V是美国微软（Microsoft）公司的一个应用程序。一种系统管理程序虚拟化技术，能够实现桌面虚拟化。 Microsoft Hyper-V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 10 Version 21H2 for x64-based Systems,Windows 11 Version 22H2 for ARM64-based Systems,Windows 11 Version 22H2 for x64-based Syst
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)

Shenlong Deep Dive — AI Deep Analysis

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Windows 10 Version 21H2 10.0.19044.0 ~ 10.0.19044.5371 -
Microsoft Windows 10 Version 22H2 10.0.19045.0 ~ 10.0.19045.5371 -
Microsoft Windows 11 version 22H2 10.0.22621.0 ~ 10.0.22621.4751 -
Microsoft Windows 11 version 22H3 10.0.22631.0 ~ 10.0.22631.4751 -
Microsoft Windows 11 Version 23H2 10.0.22631.0 ~ 10.0.22631.4751 -
Microsoft Windows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.2894 -
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 ~ 10.0.25398.1369 -
Microsoft Windows Server 2025 10.0.26100.0 ~ 10.0.26100.2894 -
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 ~ 10.0.26100.2894 -

II. Public POCs for CVE-2025-21333

# POC Description Source Link Shenlong Link
1 Poc exploit for CVE-2025-21333 heap-based buffer overflow. It leverages WNF state data and I/O ring IOP_MC_BUFFER_ENTRY https://github.com/MrAle98/CVE-2025-21333-POC POC Details
2 POC exploit for CVE-2025-21333 heap-based buffer overflow. It leverages WNF state data and I/O ring IOP_MC_BUFFER_ENTRY https://github.com/Mukesh-blend/CVE-2025-21333-POC POC Details
3 KQL para deteccion de CVE-2025-21333 en Sentinel https://github.com/aleongx/KQL_sentinel_CVE-2025-21333 POC Details
4 POC exploit for CVE-2025-21333 heap-based buffer overflow. It leverages WNF state data and I/O ring IOP_MC_BUFFER_ENTRY https://github.com/SerabiLem/CVE-2025-21333-POC POC Details
5 POC exploit for CVE-2025-21333 heap-based buffer overflow. It leverages WNF state data and I/O ring IOP_MC_BUFFER_ENTRY https://github.com/160102/CVE-2025-21333-POC POC Details
6 CVE-2025-21333 https://github.com/B1ack4sh/Blackash-CVE-2025-21333 POC Details
7 🛠️ Exploit CVE-2025-21333 in vkrnlintvsp.sys with this proof of concept, aimed at demonstrating potential threats on Windows 11 systems. https://github.com/pradip022/CVE-2025-21333-POC POC Details
8 Lab project analyzing Hyper-V kernel crash behavior (CVE-2025-21333) using WinDbg and Windows internals https://github.com/rahul0xkr/Reproducing-CVE-2025-21333- POC Details
9 CVE-2025-21333 https://github.com/Ashwesker/Blackash-CVE-2025-21333 POC Details
10 CVE-2025-21333 https://github.com/Ashwesker/Ashwesker-CVE-2025-21333 POC Details
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III. Intelligence Information for CVE-2025-21333

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Vendor Advisories for CVE-2025-21333 (1)

Same Patch Batch · Microsoft · 2025-01-14 · 157 CVEs total

CVE-2025-21298 9.8 CRITICAL Windows OLE Remote Code Execution Vulnerability
CVE-2025-21311 9.8 CRITICAL Windows NTLM V1 Elevation of Privilege Vulnerability
CVE-2025-21307 9.8 CRITICAL Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability
CVE-2025-21292 8.8 HIGH Windows Search Service Elevation of Privilege Vulnerability
CVE-2025-21266 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21282 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21293 8.8 HIGH Active Directory Domain Services Elevation of Privilege Vulnerability
CVE-2025-21291 8.8 HIGH Windows Direct Show Remote Code Execution Vulnerability
CVE-2025-21302 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21303 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21306 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21176 8.8 HIGH .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability
CVE-2025-21178 8.8 HIGH Visual Studio Remote Code Execution Vulnerability
CVE-2025-21273 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21223 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21240 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21238 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21417 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21245 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21409 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability

Showing top 20 of 157 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows 10 Version 21H2
Same vendor: Microsoft
Same weakness: CWE-122

V. Comments for CVE-2025-21333

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