Windows Virtualization-Based Security Bypass Vulnerability in Microsoft Products
CVE-2025-21340

5.5MEDIUM

Key Information:

Vendor
Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Vendor
CVE Published:
14 January 2025

Summary

The vulnerability in Windows Virtualization-Based Security (VBS) allows attackers to bypass certain security features. By exploiting this weakness, an unauthorized user may gain access to sensitive resources and potentially escalate privileges. Protecting systems against this vulnerability is essential as it undermines the integrity of the virtualization-based protections that Windows offers. Ensure that your environment is updated to mitigate this risk.

Affected Version(s)

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.6775

Windows 10 Version 21H2 32-bit Systems 10.0.19043.0 < 10.0.19044.5371

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

References

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

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.