CVE-2026-35438: Microsoft Windows Admin Center privilege escalation via missing authorization

CVE-2026-35438 · Severity: high · CVSS 8.3 · Published 2026-05-12

Windows Admin Center is a browser-based management tool used by IT administrators to manage Windows servers and infrastructure. A security flaw in this tool allows an attacker who already has basic access to the network to gain higher-level administrative permissions. This could allow an unauthorized user to take control of managed servers, potentially leading to data theft or service disruptions.

Technologies: Microsoft Windows Admin Center. Vendors: Microsoft.

Quick answers

Is CVE-2026-35438 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-35438 being exploited in the wild.
How severe is CVE-2026-35438?
High severity, with a CVSS score of 8.3, published 12 May 2026.
Which products and versions are affected?
Microsoft Windows Admin Center versions up to (excluding) 2511.
Is there a fix for CVE-2026-35438?
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-2026-35438 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-35438?
Check whether you run Microsoft Windows Admin Center 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 missing authorization vulnerability (CWE-862) exists in Microsoft Windows Admin Center. The flaw allows an authenticated attacker with low-level privileges to bypass authorization checks over the network. By exploiting this issue, the attacker can elevate their privileges to a higher level within the management console. This could lead to unauthorized configuration changes or full administrative control over the managed environment. Microsoft has addressed this in version 2511.

Affected products

  • Microsoft Windows Admin Center versions up to (excluding) 2511

Timeline

  • 2026-05-12: advisory: Initial disclosure by Microsoft
  • 2026-05-28: other: NVD analysis and CPE information added

References

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