CVE-2026-105588: Windows DHCP Server missing authentication in critical function

CVE-2026-105588 · Severity: medium · CVSS 6.4 · Published 2026-11-10

Windows DHCP Server, a network service that assigns IP addresses to computers on corporate networks, contains a missing authentication check in a critical function. An authorized user on the network could exploit this to elevate their privileges on the affected system, potentially gaining administrative access.

Technologies: Microsoft Windows DHCP Server. Vendors: Microsoft.

Quick answers

Is CVE-2026-105588 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-105588 being exploited in the wild.
How severe is CVE-2026-105588?
Medium severity, with a CVSS score of 6.4, published 10 November 2026.
Which products and versions are affected?
Microsoft Windows DHCP Server.
Is there a fix for CVE-2026-105588?
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-2026-105588 attacked?
It is attacked with local access.
Am I affected by CVE-2026-105588?
Check whether you run Microsoft Windows DHCP Server. 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 critical function in Windows DHCP Server lacks proper authentication checks, allowing privilege escalation. The vulnerability requires an attacker to be an authorized user on the system or network with local access. Successful exploitation grants elevated privileges on the target system.

Affected products

  • Microsoft Windows DHCP Server

Timeline

  • 2026-11-10: disclosed

References

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