CVE-2026-62736

Windows DHCP Client Elevation of Privilege Vulnerability

CVE-2026-62736 is fixed in 10 products on 1 platform, first by KB5120240, released August 11, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.8

Important

Exploitation

None reported

Exploitation Unlikely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0033

26th percentile

<p>Heap-based buffer overflow in Windows DHCP Client allows an authorized attacker to elevate privileges locally.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 11 Version 23H2 for ARM64-based Systems	22631.7517	KB5120240	Aug 11, 2026
Windows 11 Version 23H2 for x64-based Systems	22631.7517	KB5120240	Aug 11, 2026
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
Heap-based Buffer Overflow
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62736

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