# CVE-2026-50370: Microsoft Windows DHCP Server heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-50370-microsoft-windows-dhcp-server-heap-buffer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-14. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-50370 · Severity: high · CVSS 8.8 · Published 2026-07-14

A critical vulnerability exists in the Windows DHCP Server, a core networking component that automatically assigns IP addresses to devices on a network. An attacker located on the same local network could exploit this flaw to take full control of the server without needing any login credentials. This could lead to a complete service outage, data theft, or a foothold for further attacks within the corporate network.

Technologies: [Microsoft Windows Server 2012 R2](https://junglewise.ai/threats/technologies/windows-server-2012-r2), [Microsoft Windows 10](https://junglewise.ai/threats/technologies/windows-10), [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). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-50370 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-50370 being exploited in the wild.

**How severe is CVE-2026-50370?** High severity, with a CVSS score of 8.8, published 14 July 2026.

**Which products and versions are affected?** Microsoft Windows 10 < 10.0.14393.9339; Microsoft Windows Server 2012 < 6.2.9200.26226 / < 6.3.9600.23291; Microsoft Windows Server 2016 < 10.0.14393.9339 / < 10.0.17763.9020.

**Is there a fix for CVE-2026-50370?** 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-2026-50370 attacked?** It is attacked from the adjacent network, in an operating system.

**Am I affected by CVE-2026-50370?** 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 Windows DHCP Server service due to improper input validation (CWE-20). The flaw can be triggered by an unauthenticated attacker sending specially crafted DHCP packets over an adjacent network (Layer 2). Successful exploitation allows for remote code execution with high privileges on the affected server. Microsoft has released security updates to address this issue across multiple versions of Windows and Windows Server.

## Affected products

- Microsoft Windows 10 Version 1607 < 10.0.14393.9339
- Microsoft Windows 10 Version 1809 < 10.0.17763.9020
- Microsoft Windows Server 2012 / 2012 R2 < 6.2.9200.26226 / < 6.3.9600.23291
- Microsoft Windows Server 2016 / 2019 < 10.0.14393.9339 / < 10.0.17763.9020

## Timeline

- 2026-07-14: disclosed
- 2026-07-14: advisory

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50370](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50370)

## Related threats

- [Microsoft Windows Recovery Environment UEFI/BIOS password bypass](https://junglewise.ai/threats/cve-2026-116638-the-windows-recovery-environment-winre-in-windows-10-and-11-may)
- [Windows DNS Server out-of-bounds read](https://junglewise.ai/threats/cve-2026-97844-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [Windows DNS Server out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-97843-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [Windows DNS Server out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-97842-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [Windows DNS Server out-of-bounds read](https://junglewise.ai/threats/cve-2026-97841-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)