CVE-2026-48564

DHCP Server Service Remote Code Execution Vulnerability

CVE-2026-48564 is fixed in 15 products on 1 platform, first by KB5094042, released June 9, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent

CVSS

8.8

Critical

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0091

60th percentile

<p>Heap-based buffer overflow in Windows DHCP Server allows an authorized attacker to execute code over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 10 Version 1607 for 32-bit Systems	14393.9339	KB5099535	Jul 14, 2026
Windows 10 Version 1607 for x64-based Systems	14393.9339	KB5099535	Jul 14, 2026
Windows 10 Version 1809 for 32-bit Systems	17763.9020	KB5099538	Jul 14, 2026
Windows 10 Version 1809 for x64-based Systems	17763.9020	KB5099538	Jul 14, 2026
Windows Server 2012		KB5094042	Jun 9, 2026
Windows Server 2012 (Server Core installation)		KB5094042	Jun 9, 2026
Windows Server 2012 R2		KB5094041	Jun 9, 2026
Windows Server 2012 R2 (Server Core installation)		KB5094041	Jun 9, 2026
Windows Server 2016	14393.9339	KB5099535	Jul 14, 2026
Windows Server 2016 (Server Core installation)	14393.9339	KB5099535	Jul 14, 2026
Windows Server 2019	17763.9020	KB5099538	Jul 14, 2026
Windows Server 2019 (Server Core installation)	17763.9020	KB5099538	Jul 14, 2026
Windows Server 2022	20348.5386	KB5099540	Jul 14, 2026
Windows Server 2025	26100.33158	KB5099536	Jul 14, 2026
Windows Server 2025 (Server Core installation)	26100.33158	KB5099536	Jul 14, 2026

Details

Published
July 14, 2026
Weakness
Heap-based Buffer Overflow
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48564

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