CVE-2026-35420
High
Description
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Microsoft Windows Server
PublishedMay 12, 2026
First seenMay 12, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- microsoft windows_server_201610.0.14393.9140 or later
- microsoft windows_server_201910.0.17763.8755 or later
- microsoft windows_server_202210.0.20348.5074 or later
- microsoft windows_server_2022_23h210.0.25398.2330 or later
- microsoft windows_server_202510.0.26100.32772 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_server_2012 | No range specified, r2 | — |
| microsoft windows_server_2016 | v < 10.0.14393.9140 | 10.0.14393.9140 |
| microsoft windows_server_2019 | v < 10.0.17763.8755 | 10.0.17763.8755 |
| microsoft windows_server_2022 | v < 10.0.20348.5074 | 10.0.20348.5074 |
| microsoft windows_server_2022_23h2 | v < 10.0.25398.2330 | 10.0.25398.2330 |
| microsoft windows_server_2025 | v < 10.0.26100.32772 | 10.0.26100.32772 |
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