What is CVE-2026-35438?

CVE-2026-35438 is a high-severity vulnerability in Microsoft Windows Admin Center, classified under Missing Authorization. CVSS score: 8.3/10. Published 2026-05-12.

How severe is CVE-2026-35438?

High severity. CVSS v3 base score is 8.3 out of 10.

Auth bypass in Microsoft Windows Admin Center

CVE-2026-35438

Missing authorization in Windows Admin Center allows an authorized attacker to elevate privileges over a network.

Vulnerability class: Broken Access Control

EPSS: 0.001 (20.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H.

Affected products

Microsoft Windows Admin Center — versions 1809.0
Microsoft Windows_admin_center

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-35438?: CVE-2026-35438 is a high-severity vulnerability in Microsoft Windows Admin Center, classified under Missing Authorization. CVSS score: 8.3/10. Published 2026-05-12.
How severe is CVE-2026-35438?: High severity. CVSS v3 base score is 8.3 out of 10.