CVE-2026-61361

Windows DHCP Client Remote Code Execution Vulnerability

CVE-2026-61361 is fixed in 8 products on 1 platform, first by KB5121003, released August 11, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.0

Important

Exploitation

None reported

Exploitation Unlikely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0026

18th percentile

<p>Use after free in Windows DHCP Client allows an authorized attacker to execute code locally.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 11 Version 24H2 for ARM64-based Systems		KB5121003	Aug 11, 2026
Windows 11 Version 24H2 for ARM64-based Systems		KB5120994	Aug 11, 2026
Windows 11 Version 24H2 for x64-based Systems		KB5121003	Aug 11, 2026
Windows 11 Version 24H2 for x64-based Systems		KB5120994	Aug 11, 2026
Windows 11 Version 25H2 for ARM64-based Systems		KB5121003	Aug 11, 2026
Windows 11 Version 25H2 for ARM64-based Systems		KB5120994	Aug 11, 2026
Windows 11 Version 25H2 for x64-based Systems		KB5121003	Aug 11, 2026
Windows 11 Version 25H2 for x64-based Systems		KB5120994	Aug 11, 2026
Windows 11 Version 26H1 for ARM64-based Systems	28000.2704	KB5121000	Aug 11, 2026
Windows 11 version 26H1 for x64-based Systems	28000.2704	KB5121000	Aug 11, 2026
Windows Server 2025	26100.33222	KB5120228	Aug 11, 2026
Windows Server 2025	26100.33296	KB5120233	Aug 11, 2026
Windows Server 2025 (Server Core installation)	26100.33222	KB5120228	Aug 11, 2026
Windows Server 2025 (Server Core installation)	26100.33296	KB5120233	Aug 11, 2026

Details

Published
August 11, 2026
Weakness
Use After Free
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-61361

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