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
Description
Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacker to elevate privileges over a network.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | windows_kerberos | * |
Helpful Resources
Exploitability
CWE
KEV
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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]
How can this vulnerability impact me? :
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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