# CVE-2026-70201: Microsoft Windows DHCP Server out-of-bounds read

Source: https://junglewise.ai/threats/cve-2026-70201-out-of-bounds-read-in-windows-dhcp-server-allows-an-authorized  
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-2026-70201 · Severity: medium · CVSS 5.5 · Published 2026-10-13

Windows DHCP Server, which manages IP address assignment on networks, contains a memory access flaw that allows an authenticated attacker to crash the service. This can disrupt network connectivity for systems relying on the DHCP server, resulting in a denial of service.

Technologies: [Microsoft Windows DHCP Server](https://junglewise.ai/threats/technologies/windows-dhcp-server), [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-2026-70201 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-70201 being exploited in the wild.

**How severe is CVE-2026-70201?** Medium severity, with a CVSS score of 5.5, published 13 October 2026.

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

**Is there a fix for CVE-2026-70201?** 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-2026-70201 attacked?** It is attacked with local access, in a hosted service.

**Am I affected by CVE-2026-70201?** Check whether you run Microsoft Windows DHCP Server, Microsoft Windows Server 2012, Microsoft Windows Server 2016 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 read vulnerability exists in Windows DHCP Server that can be triggered by an authorized attacker to cause a denial of service. The flaw requires local or authenticated network access and results in a crash of the DHCP Server process. No remote unauthenticated exploitation is possible.

## Affected products

- Microsoft Windows DHCP Server

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70201](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70201)

## 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)