CVE-2026-70064
High
Description
Integer underflow (wrap or wraparound) in Windows Kerberos 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-191CWE-191
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 10 Version 21H210.0.19044.7807 or later
- Microsoft Windows 10 Version 22H210.0.19045.7807 or later
- Microsoft Windows 11 version 23H210.0.22631.7652 or later
- Microsoft Windows 11 Version 23H210.0.22631.7652 or later
- Microsoft Windows 11 Version 24H210.0.26100.9711 or later
- Microsoft Windows 11 Version 25H210.0.26200.9711 or later
- Microsoft Windows 11 version 26H110.0.28000.3231 or later
- Microsoft Windows 11 Version 26H210.0.26300.9711 or later
- Microsoft Windows Server 20126.2.9200.26434 or later
- Microsoft Windows Server 2012 (Server Core installation)6.2.9200.26434 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 10 Version 21H2 | 10.0.19044.0 ≤ v < 10.0.19044.7807 | 10.0.19044.7807 |
| Microsoft Windows 10 Version 22H2 | 10.0.19045.0 ≤ v < 10.0.19045.7807 | 10.0.19045.7807 |
| Microsoft Windows 11 version 23H2 | 10.0.22631.0 ≤ v < 10.0.22631.7652 | 10.0.22631.7652 |
| Microsoft Windows 11 Version 23H2 | 10.0.22631.0 ≤ v < 10.0.22631.7652 | 10.0.22631.7652 |
| Microsoft Windows 11 Version 24H2 | 10.0.26100.0 ≤ v < 10.0.26100.9711 | 10.0.26100.9711 |
| Microsoft Windows 11 Version 25H2 | 10.0.26200.0 ≤ v < 10.0.26200.9711 | 10.0.26200.9711 |
| Microsoft Windows 11 version 26H1 | 10.0.28000.0 ≤ v < 10.0.28000.3231 | 10.0.28000.3231 |
| Microsoft Windows 11 Version 26H2 | 10.0.26300.0 ≤ v < 10.0.26300.9711 | 10.0.26300.9711 |
| 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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