CVE-2026-20803
Unknown Unknown - Not Provided
Missing Authentication in SQL Server Enables Privilege Escalation

Publication date: 2026-01-13

Last updated on: 2026-01-13

Assigner: Microsoft Corporation

Description
Missing authentication for critical function in SQL Server 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-2026-20803
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft sql_server *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-306 The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
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Executive Summary

This vulnerability is a missing authentication for a critical function in Microsoft SQL Server, which allows an authorized attacker to elevate their privileges over a network. [1]

Impact Analysis

An attacker who is already authorized can exploit this vulnerability to gain higher privileges than intended, potentially leading to full control over the SQL Server and compromising confidentiality, integrity, and availability of data. [1]

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