Insufficient verification of data authenticity in Microsoft Windows Virtualization-Based Security (VBS)



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-27735
CWE-ID CWE-345
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Insufficient verification of data authenticity

EUVDB-ID: #VU107286

Risk: Low

CVSSv4.0: 5.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-27735

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to insufficient verification of data authenticity in Windows Virtualization-Based Security (VBS). A local administrator can bypass the Virtualization-based Security feature.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 21H2 10.0.19041.3920 - 11 24H2 10.0.26100.3476

Windows Server: 2012 R2 6.3.9600.21871 - 2025 10.0.26100.3476

CPE2.3 External links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27735


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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