CVE-2026-108471: Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 8.8)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Oct

Released

2026-10-13

Description

Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.

FAQ

What privileges would an attacker gain by successfully exploiting this vulnerability? An attacker who successfully exploited this vulnerability could potentially leak data from the target enclave or execute code within the context of the target enclave. How could an attacker exploit this vulnerability? A locally authenticated attacker could run a specially crafted application that submits a malicious report request to an affected VBS enclave. Successful exploitation could allow the attacker to execute code within the target enclave.

Affected Products (4)

Windows

• Windows Server 2019
• Windows 10 Version 1809 for 32-bit Systems
• Windows 10 Version 1809 for x64-based Systems
• Windows Server 2019 (Server Core installation)

Security Updates (1)

• 5126651

Acknowledgments

<a href="https://twitter.com/a_denkiewicz">Adrian Denkiewicz</a> with <a href="https://doyensec.com/">Doyensec</a>

Revision History

• 2026-10-13: Information published.