Improper Authorization in Windows Server - CVE-2026-27912
Published: April 15, 2026
Vulnerability identifier: #VU126132
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-27912
CWE-ID: CWE-285
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows Server
Windows Server
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass authorization checks.
The vulnerability exists due to insufficient authorization controls in Windows Kerberos. A remote user on the local network can gain elevated privileges on the target system.
How to mitigate CVE-2026-27912
Install updates from vendor's website.