Elevation of Privilege Vulnerability in Windows Hyper-V by Microsoft
CVE-2025-21335

7.8HIGH

Key Information:

Vendor
Microsoft
Status
Windows 10 Version 21h2
Windows 11 Version 22h2
Windows 10 Version 22h2
Windows Server 2025 (server Core Installation)
Vendor
CVE Published:
14 January 2025

Badges

👾 Exploit Exists🦅 CISA Reported

Summary

The vulnerability in Windows Hyper-V's NT Kernel Integration affects the Virtual Service Provider (VSP), potentially allowing attackers to elevate privileges within the affected system. Successful exploitation could lead to unauthorized access to system resources and sensitive data. The flaw highlights the importance of promptly securing the Hyper-V environment and monitoring for unusual activities that may indicate exploitation attempts.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected Version(s)

Windows 10 Version 21H2 x64-based Systems 10.0.19043.0 < 10.0.19044.5371

Windows 10 Version 22H2 x64-based Systems 10.0.19045.0 < 10.0.19045.5371

Windows 11 version 22H2 ARM64-based Systems 10.0.22621.0 < 10.0.22621.4751

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

.