CVE-2026-48564: Microsoft Windows DHCP Server heap buffer overflow

CVE-2026-48564 · Severity: high · CVSS 8.8 · Published 2026-07-14

A security vulnerability exists in the Windows DHCP Server, a core service that automatically assigns IP addresses to devices on a network. An authorized user on the network could exploit this flaw to run malicious code on the server. This could lead to a full system takeover, allowing an attacker to disrupt network operations or access sensitive data.

Technologies: Microsoft Windows Server 2012 R2, Microsoft Windows 10, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019. Vendors: Microsoft.

Quick answers

Is CVE-2026-48564 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-48564 being exploited in the wild.
How severe is CVE-2026-48564?
High severity, with a CVSS score of 8.8, published 14 July 2026.
Which products and versions are affected?
Microsoft Windows Server 2012 R2 6.3.9600.0 to 6.3.9600.23228; Microsoft Windows 10 10.0.14393.0 to 10.0.14393.9339; Microsoft Windows Server 2012 6.2.9200.0 to 6.2.9200.26132; Microsoft Windows Server 2016 10.0.14393.0 to 10.0.14393.9339; and 1 more.
Is there a fix for CVE-2026-48564?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-48564 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2026-48564?
Check whether you run Microsoft Windows Server 2012 R2, Microsoft Windows 10, Microsoft Windows Server 2012 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A heap-based buffer overflow vulnerability (CWE-122) exists in the Microsoft Windows DHCP Server service. The flaw is triggered when the service improperly handles specially crafted network packets. An attacker with low-privileged network credentials can exploit this vulnerability remotely without user interaction to achieve arbitrary code execution in the context of the service. Microsoft has released security updates to address this issue across affected versions of Windows 10 and Windows Server.

Affected products

  • Microsoft Windows 10 Version 1607 10.0.14393.0 to 10.0.14393.9339
  • Microsoft Windows 10 Version 1809 10.0.17763.0 to 10.0.17763.9020
  • Microsoft Windows Server 2012 6.2.9200.0 to 6.2.9200.26132
  • Microsoft Windows Server 2012 R2 6.3.9600.0 to 6.3.9600.23228
  • Microsoft Windows Server 2016 10.0.14393.0 to 10.0.14393.9339
  • Microsoft Windows Server 2019 10.0.17763.0 to 10.0.17763.9020

Timeline

  • 2026-07-14: disclosed: Initial publication by Microsoft and NVD
  • 2026-07-14: advisory

References

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