CVE-2026-27912
Received Received - Intake
Improper Authorization in Windows Kerberos Enables Privilege Escalation

Publication date: 2026-04-14

Last updated on: 2026-04-23

Assigner: Microsoft Corporation

Description
Improper authorization in Windows Kerberos allows an authorized attacker to elevate privileges over an adjacent network.
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Meta Information
Published
2026-04-14
Last Modified
2026-04-23
Generated
2026-06-16
AI Q&A
2026-04-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-27912
EUVD
EUVD-2026-22453
Affected Vendors & Products
Showing 7 associated CPEs
Vendor Product Version / Range
microsoft windows_server_2012 r2
microsoft windows_server_2012 *
microsoft windows_server_2016 to 10.0.14393.9060 (exc)
microsoft windows_server_2019 to 10.0.17763.8644 (exc)
microsoft windows_server_2022 to 10.0.20348.5020 (exc)
microsoft windows_server_2022_23h2 to 10.0.25398.2274 (exc)
microsoft windows_server_2025 to 10.0.26100.32690 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-285 The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
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Executive Summary

This vulnerability involves improper authorization in the Windows Kerberos authentication system. It allows an attacker who is already authorized on an adjacent network to elevate their privileges beyond what they should normally have.

Impact Analysis

An attacker exploiting this vulnerability can gain higher privileges on a Windows system over an adjacent network. This can lead to complete compromise of confidentiality, integrity, and availability of the affected system.

Compliance Impact

The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

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