CVE-2026-108471

Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability

CVE-2026-108471 is fixed in 4 products on 1 platform, first by KB5126651, released October 13, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent

CVSS

8.8

Critical

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0037

30th percentile

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

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 10 Version 1809 for 32-bit Systems	17763.9376	KB5126651	Oct 13, 2026
Windows 10 Version 1809 for x64-based Systems	17763.9376	KB5126651	Oct 13, 2026
Windows Server 2019	17763.9376	KB5126651	Oct 13, 2026
Windows Server 2019 (Server Core installation)	17763.9376	KB5126651	Oct 13, 2026

Details

Published
October 13, 2026
Weakness
Incomplete List of Disallowed Inputs
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108471

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