# CVE-2026-70058: Microsoft Windows DHCP Server out-of-bounds write remote code execution

Source: https://junglewise.ai/threats/cve-2026-70058-out-of-bounds-write-in-windows-dhcp-server-allows-an-unauthorized  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-28  
License: CC BY 4.0 with a link back

CVE-2026-70058 · Severity: high · CVSS 7.5 · Published 2026-10-13

Windows DHCP Server is a critical network service that assigns IP addresses to devices on corporate networks. An unauthenticated attacker can exploit an out-of-bounds write vulnerability to execute arbitrary code remotely on the DHCP server, potentially compromising network infrastructure and enabling lateral movement throughout an organization.

Technologies: [Microsoft Windows DHCP Server](https://junglewise.ai/threats/technologies/windows-dhcp-server), [Microsoft Windows 10 1607](https://junglewise.ai/threats/technologies/windows-10-1607), [Microsoft Windows 10 1809](https://junglewise.ai/threats/technologies/windows-10-1809), [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012), [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016), [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019), [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022), [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-70058 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-70058 being exploited in the wild.

**How severe is CVE-2026-70058?** High severity, with a CVSS score of 7.5, published 13 October 2026.

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

**Is there a fix for CVE-2026-70058?** 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-2026-70058 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-70058?** Check whether you run Microsoft Windows DHCP Server, Microsoft Windows 10 1607, Microsoft Windows 10 1809 or one of the others listed. 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

An out-of-bounds write vulnerability in Windows DHCP Server allows unauthenticated remote code execution via specially crafted network packets. The vulnerability can be exploited over the network without authentication or user interaction, granting an attacker the ability to execute arbitrary code with DHCP server privileges.

## Affected products

- Microsoft Windows DHCP Server

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70058](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70058)

## 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)