CVE-2026-65785

Windows DHCP Client Denial of Service Vulnerability

State: Published
Severity: 6.5 Medium
Published: Aug 11, 2026
Updated: Oct 30, 2026
Reserved: Jul 22, 2026

Description

Uncontrolled resource consumption in Windows DHCP Client allows an unauthorized attacker to deny service over an adjacent network.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.9168Affected
Windows 11 Version 25H2Microsoft	10.0.26200.0 to before 10.0.26200.9168Affected
Windows 11 version 26H1Microsoft	10.0.28000.0 to before 10.0.28000.2704Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.33296Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.33296Affected

References

Windows DHCP Client Denial of Service Vulnerabilityvendor-advisorypatch

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