Improper authentication in Windows Admin Center - CVE-2026-26119
Published: February 18, 2026 / Updated: September 4, 2026
Vulnerability identifier: #VU123003
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-26119
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote user to compromise the affected system.
The vulnerability exists due to an error in the authentication process. A remote user can execute arbitrary code with elevated privileges.
Affected software
Windows Admin Center
How to mitigate CVE-2026-26119
Install updates from vendor's website.
Windows Admin Center - update to 2.6.4