CVE-2026-27912

| EUVD-2026-22453 HIGH
2026-04-14 microsoft
Authentication Bypass Microsoft Windows Server 2012 Windows Server 2012 Server Core Installation Windows Server 2012 R2 Windows Server 2012 R2 Server Core Installation Windows Server 2016 Windows Server 2016 Server Core Installation Windows Server 2019 Windows Server 2019 Server Core Installation Windows Server 2022 Windows Server 2022 23H2 Edition Server Core Installation Windows Server 2025 Windows Server 2025 Server Core Installation
8.0
CVSS 3.1
Temporal: 7.0
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CVSS VectorNVD

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

1
Analysis Generated
Apr 14, 2026 - 19:29 vuln.today

DescriptionNVD

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

AnalysisAI

Windows Kerberos authorization bypass enables authenticated attackers on adjacent networks to escalate privileges to high integrity levels across Windows Server 2012 through 2025. The flaw affects both desktop experience and Server Core installations. …

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RemediationAI

Within 24 hours: Inventory all Windows Server 2012 through 2025 instances (including Server Core) and identify which require patching; obtain vendor security update details from Microsoft. Within 7 days: Deploy vendor-released patches to non-production Windows Server systems and validate functionality; establish a phased production rollout schedule with change management approval. …

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CVE-2026-27912 vulnerability details – vuln.today
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