# CVE-2026-69547: Microsoft Windows DHCP Server heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-69547-microsoft-windows-dhcp-server-heap-buffer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-69547 · Severity: high · CVSS 8.8 · Published 2026-09-08

Windows DHCP Server is a critical network service that assigns IP addresses to computers on corporate networks. A heap buffer overflow vulnerability allows an authorized network attacker to execute arbitrary code with system privileges, potentially compromising the entire network infrastructure and all connected devices.

Technologies: [Microsoft Windows DHCP Server](https://junglewise.ai/threats/technologies/windows-dhcp-server). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69547 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69547 being exploited in the wild.

**How severe is CVE-2026-69547?** High severity, with a CVSS score of 8.8, published 8 September 2026.

**Which products and versions are affected?** Microsoft Windows DHCP Server <UNKNOWN>.

**Is there a fix for CVE-2026-69547?** 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-2026-69547 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-69547?** Check whether you run Microsoft Windows DHCP Server 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

This vulnerability is a heap-based buffer overflow in the Windows DHCP Server component. The flaw allows an authorized attacker with network access to trigger memory corruption through crafted network packets, enabling remote code execution with system privileges. The vulnerability requires the attacker to have network connectivity to the DHCP server and authentication/authorization to interact with the service. A successful exploit could lead to complete system compromise and lateral movement within the network. Microsoft has released patches to address this issue.

## Affected products

- Microsoft Windows DHCP Server <UNKNOWN>

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69547](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69547)

## Related threats

- [Microsoft Windows DHCP Server uncontrolled resource consumption](https://junglewise.ai/threats/cve-2026-96134-uncontrolled-resource-consumption-in-windows-dhcp-server-allows)
- [Windows DHCP Server time-of-check time-of-use race condition](https://junglewise.ai/threats/cve-2026-88216-time-of-check-time-of-use-toctou-race-condition-in-windows-dhcp)
- [Microsoft Windows DHCP Server use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-72998-use-after-free-in-windows-dhcp-server-allows-an-unauthorized)
- [Windows DHCP Server out-of-bounds read](https://junglewise.ai/threats/cve-2026-119890-out-of-bounds-read-in-windows-dhcp-server-allows-an-authorized)
- [Microsoft Windows DHCP Server improper access control](https://junglewise.ai/threats/cve-2026-113773-improper-access-control-in-windows-dhcp-server-allows-an)