CVE-2026-70250
High
Description
Use after free in Windows DHCP Client allows an unauthorized attacker to execute code over an adjacent network.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Windows Server 2012
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-416Use after freeCWE-362Race condition
How to fix
Update
- 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
- Microsoft Windows Server 2025 (Server Core installation)10.0.26100.33650 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| 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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