CVE-2026-20849
Unknown Unknown - Not Provided
Privilege Escalation via Untrusted Input in Windows Kerberos

Publication date: 2026-01-13

Last updated on: 2026-01-13

Assigner: Microsoft Corporation

Description
Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacker to elevate privileges over a network.
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Meta Information
Published
2026-01-13
Last Modified
2026-01-13
Generated
2026-06-16
AI Q&A
2026-01-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-20849
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft windows_kerberos *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-807 The product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism.
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Executive Summary

This vulnerability involves reliance on untrusted inputs in a security decision within Windows Kerberos, which allows an authorized attacker to elevate their privileges over a network. [1]

Impact Analysis

An authorized attacker could exploit this vulnerability to elevate their privileges over a network, potentially gaining higher-level access than intended, which could lead to unauthorized actions or access to sensitive information. [1]

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