What is CVE-2026-26119?

CVE-2026-26119 is a high-severity vulnerability in Microsoft Windows Admin Center, classified under Improper Authentication. CVSS score: 8.8/10. Published 2026-02-17.

How severe is CVE-2026-26119?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Microsoft Windows Admin Center

CVE-2026-26119

Improper authentication in Windows Admin Center allows an authorized attacker to elevate privileges over a network.

Vulnerability class: Broken Authentication

EPSS: 0.001 (20.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.

Affected products

Microsoft Windows Admin Center — versions 1809.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

Windows Admin Center Elevation of Privilege Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-26119?: CVE-2026-26119 is a high-severity vulnerability in Microsoft Windows Admin Center, classified under Improper Authentication. CVSS score: 8.8/10. Published 2026-02-17.
How severe is CVE-2026-26119?: High severity. CVSS v3 base score is 8.8 out of 10.