# CVE-2026-119890: Windows DHCP Server out-of-bounds read

Source: https://junglewise.ai/threats/cve-2026-119890-out-of-bounds-read-in-windows-dhcp-server-allows-an-authorized  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-119890 · Severity: medium · CVSS 5.3 · Published 2026-11-10

Windows DHCP Server contains an out-of-bounds read vulnerability that allows an authorized attacker to crash the DHCP service, causing denial of service to network clients. An attacker with network access and valid credentials can trigger this flaw to disrupt DHCP operations, preventing devices from obtaining IP addresses and connecting to the network.

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-2026-119890 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119890 being exploited in the wild.

**How severe is CVE-2026-119890?** Medium severity, with a CVSS score of 5.3, published 10 November 2026.

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

**Is there a fix for CVE-2026-119890?** 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-2026-119890 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-119890?** 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

An out-of-bounds read exists in Windows DHCP Server that can be triggered by an authorized attacker over the network. The vulnerability allows reading memory beyond allocated buffer boundaries, leading to service crash and denial of service. Exploitation requires network access and valid authentication credentials.

## Affected products

- Microsoft Windows DHCP Server <UNKNOWN>

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119890](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119890)

## 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)
- [Microsoft Windows DHCP Server improper access control](https://junglewise.ai/threats/cve-2026-113773-improper-access-control-in-windows-dhcp-server-allows-an)
- [Windows DHCP Server missing authentication in critical function](https://junglewise.ai/threats/cve-2026-105588-missing-authentication-for-critical-function-in-windows-dhcp)