CVE-2026-105009
High
Description
Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Microsoft Windows Server
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-276CWE-276
How to fix
Update
- microsoft windows_server_201610.0.14393.9612 or later
- microsoft windows_server_201910.0.17763.9376 or later
- microsoft windows_server_202210.0.20348.5761 or later
- microsoft windows_server_202510.0.26100.33650 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_server_2012 | No range specified, r2 | — |
| microsoft windows_server_2016 | v < 10.0.14393.9612 | 10.0.14393.9612 |
| microsoft windows_server_2019 | v < 10.0.17763.9376 | 10.0.17763.9376 |
| microsoft windows_server_2022 | v < 10.0.20348.5761 | 10.0.20348.5761 |
| microsoft windows_server_2025 | v < 10.0.26100.33650 | 10.0.26100.33650 |
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