CVE-2026-27912

Published: Apr 14, 2026Modified: Jun 17, 2026

8.0

Vector

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.1 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

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

Affected (7)

Products: Microsoft: Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2022 23h2, Windows Server 2025

6 products

Windows Server 2012

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2022 23h2

Windows Server 2025

Configuration A

7 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows Server 2012	All versions
Microsoft Windows Server 2012	Version r2
Microsoft Windows Server 2016	Before 10.0.14393.9060
Microsoft Windows Server 2019	Before 10.0.17763.8644
Microsoft Windows Server 2022	Before 10.0.20348.5020
Microsoft Windows Server 2022 23h2	Before 10.0.25398.2274
Microsoft Windows Server 2025	Before 10.0.26100.32690

Related CWEs

Improper Authorization

The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27912

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.