Microsoft acknowledged a new issue caused by the June 2025 security updates, causing the DHCP service to freeze on some Windows Server systems.
On Windows Server systems, the Dynamic Host Configuration Protocol (DHCP) Server service automates assigning IP addresses and other network configurations, reducing network administration and ensuring reliable IP address configuration in Windows networks.
In affected environments, the new DHCP known issue confirmed by Microsoft over the weekend prevents renewals of unicast IP addresses from applying correctly across network devices.
"The DHCP Server service might intermittently stop responding after installing this security update. This issue affects IP renewal for clients," the company says in updates added to security advisories issued during this month's Patch Tuesday.
The list of affected Windows versions and the updates causing this issue includes:
Windows Server 2016 (KB5061010)
Windows Server 2019 (KB5060531)
Windows Server 2022 (KB5060526)
Windows Server 2025 (KB5060842)
"We are working on releasing a resolution in the coming days and will provide more information when it is available," Microsoft added.
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