CVE-2026-108471
High CVSS 8.8Published 2026-10-13 ยท last changed 2026-10-13
The fix
Microsoft fixes this in updateKB5126651. The fixed build differs per Windows version, so the row that matters is the one matching the machine you are looking at.
| Windows version | Fixed in build | Update | Released |
|---|---|---|---|
| Windows 10 Version 1809 for 32-bit Systems | 10.0.17763.9376 | KB5126651 | 2026-10-13 |
| Windows 10 Version 1809 for x64-based Systems | 10.0.17763.9376 | KB5126651 | 2026-10-13 |
| Windows Server 2019 | 10.0.17763.9376 | KB5126651 | 2026-10-13 |
| Windows Server 2019 (Server Core installation) | 10.0.17763.9376 | KB5126651 | 2026-10-13 |
Having the KB is not the same as knowing whether a machine has it. Windows updates supersede each other, so the update you installed often covers a fix that shipped in an earlier one. Paste your build into the patch checker and it walks that chain for you.
What it is
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.
Sources
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H