CVE-2026-27912

Windows Kerberos Elevation of Privilege Vulnerability

State: Published
Severity: 8.0 High
Published: Apr 14, 2026
Updated: Oct 15, 2026
Reserved: Feb 24, 2026

Description

Improper authorization in Windows Kerberos allows an authorized attacker to elevate privileges over an adjacent network.

Scores

CVSS	Score	Vector	Source
3.1	8.0 High	CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-285 Improper Authorization

Affected Products

Product	Versions
Windows Server 2012Microsoft	6.2.9200.0 to before 6.2.9200.26026Affected
Windows Server 2012 (Server Core installation)Microsoft	6.2.9200.0 to before 6.2.9200.26026Affected
Windows Server 2012 R2Microsoft	6.3.9600.0 to before 6.3.9600.23132Affected
Windows Server 2012 R2 (Server Core installation)Microsoft	6.3.9600.0 to before 6.3.9600.23132Affected
Windows Server 2016Microsoft	10.0.14393.0 to before 10.0.14393.9060Affected
Windows Server 2016 (Server Core installation)Microsoft	10.0.14393.0 to before 10.0.14393.9060Affected
Windows Server 2019Microsoft	10.0.17763.0 to before 10.0.17763.8644Affected
Windows Server 2019 (Server Core installation)Microsoft	10.0.17763.0 to before 10.0.17763.8644Affected
Windows Server 2022Microsoft	10.0.20348.0 to before 10.0.20348.5020Affected
Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft	10.0.25398.0 to before 10.0.25398.2274Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.32690Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.32690Affected

References

Windows Kerberos Elevation of Privilege Vulnerabilityvendor-advisorypatch

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