CVE-2026-81969
High
Description
Insufficient granularity of access control in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Windows 10 Version 1607
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-1220CWE-1220
How to fix
Update
- Microsoft Windows 10 Version 160710.0.14393.9612 or later
- Microsoft Windows 10 Version 180910.0.17763.9376 or later
- Microsoft Windows Server 20126.2.9200.26434 or later
- Microsoft Windows Server 2012 (Server Core installation)6.2.9200.26434 or later
- Microsoft Windows Server 2012 R26.3.9600.23470 or later
- Microsoft Windows Server 2012 R2 (Server Core installation)6.3.9600.23470 or later
- Microsoft Windows Server 201610.0.14393.9612 or later
- Microsoft Windows Server 2016 (Server Core installation)10.0.14393.9612 or later
- Microsoft Windows Server 201910.0.17763.9376 or later
- Microsoft Windows Server 2019 (Server Core installation)10.0.17763.9376 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 10 Version 1607 | 10.0.14393.0 ≤ v < 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft Windows 10 Version 1809 | 10.0.17763.0 ≤ v < 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft Windows Server 2012 | 6.2.9200.0 ≤ v < 6.2.9200.26434 | 6.2.9200.26434 |
| Microsoft Windows Server 2012 (Server Core installation) | 6.2.9200.0 ≤ v < 6.2.9200.26434 | 6.2.9200.26434 |
| Microsoft Windows Server 2012 R2 | 6.3.9600.0 ≤ v < 6.3.9600.23470 | 6.3.9600.23470 |
| Microsoft Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 ≤ v < 6.3.9600.23470 | 6.3.9600.23470 |
| Microsoft Windows Server 2016 | 10.0.14393.0 ≤ v < 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft Windows Server 2016 (Server Core installation) | 10.0.14393.0 ≤ v < 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft Windows Server 2019 | 10.0.17763.0 ≤ v < 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft Windows Server 2019 (Server Core installation) | 10.0.17763.0 ≤ v < 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft Windows Server 2022 | 10.0.20348.0 ≤ v < 10.0.20348.5761 | 10.0.20348.5761 |
| Microsoft Windows Server 2025 | 10.0.26100.0 ≤ v < 10.0.26100.33650 | 10.0.26100.33650 |
| Microsoft Windows Server 2025 (Server Core installation) | 10.0.26100.0 ≤ v < 10.0.26100.33650 | 10.0.26100.33650 |
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