CVE-2026-88119
High
Description
Use after free in Windows DHCP Server allows an unauthorized attacker to execute code over a network.
SeverityHigh
CVSS8.1
Exploit probability—
Product
Windows Server 2012
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-416Use after free
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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