CVE-2026-70250

Windows DHCP Client Remote Code Execution Vulnerability

State: Published
Severity: 8.8 High
Published: Oct 13, 2026
Updated: Oct 31, 2026
Reserved: Aug 3, 2026

Description

Use after free in Windows DHCP Client allows an unauthorized attacker to execute code over an adjacent network.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-416 Use After Free
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
Windows Server 2012Microsoft	6.2.9200.0 to before 6.2.9200.26434Affected
Windows Server 2012 (Server Core installation)Microsoft	6.2.9200.0 to before 6.2.9200.26434Affected
Windows Server 2012 R2Microsoft	6.3.9600.0 to before 6.3.9600.23470Affected
Windows Server 2012 R2 (Server Core installation)Microsoft	6.3.9600.0 to before 6.3.9600.23470Affected
Windows Server 2016Microsoft	10.0.14393.0 to before 10.0.14393.9612Affected
Windows Server 2016 (Server Core installation)Microsoft	10.0.14393.0 to before 10.0.14393.9612Affected
Windows Server 2019Microsoft	10.0.17763.0 to before 10.0.17763.9376Affected
Windows Server 2019 (Server Core installation)Microsoft	10.0.17763.0 to before 10.0.17763.9376Affected
Windows Server 2022Microsoft	10.0.20348.0 to before 10.0.20348.5761Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.33650Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.33650Affected

References

Windows DHCP Client Remote Code Execution Vulnerabilityvendor-advisorypatch

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