CVE-2026-20876
Medium
Description
Heap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.
SeverityMedium
CVSS6.7
Exploit probability—
Product
Microsoft Windows
PublishedJan 13, 2026
First seenJan 13, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- microsoft windows_11_23h210.0.22631.6491 or later
- microsoft windows_11_24h210.0.26100.7623 or later
- microsoft windows_11_25h210.0.26200.7623 or later
- microsoft windows_server_2022_23h210.0.25398.2092 or later
- microsoft windows_server_202510.0.26100.32230 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_11_23h2 | v < 10.0.22631.6491 | 10.0.22631.6491 |
| microsoft windows_11_24h2 | v < 10.0.26100.7623 | 10.0.26100.7623 |
| microsoft windows_11_25h2 | v < 10.0.26200.7623 | 10.0.26200.7623 |
| microsoft windows_server_2022_23h2 | v < 10.0.25398.2092 | 10.0.25398.2092 |
| microsoft windows_server_2025 | v < 10.0.26100.32230 | 10.0.26100.32230 |
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