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
Description
Missing authentication for critical function in SQL Server 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 | sql_server | * |
Helpful Resources
Exploitability
CWE
KEV
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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]
How can this vulnerability impact me? :
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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