CVE-2026-20803
High
Description
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
SeverityHigh
CVSS7.2
Exploit probability69. percentile1.2%
Product
Microsoft Sql Server
PublishedJan 13, 2026
First seenJan 13, 2026
Weakness typeCWE-306Missing authentication for critical function
How to fix
Update
- microsoft sql_server_202216.0.1165.1, 16.0.4230.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft sql_server_2022 | 16.0.1000.6 ≤ v < 16.0.1165.1, 16.0.4003.1 ≤ v < 16.0.4230.2 | 16.0.1165.1, 16.0.4230.2 |
| microsoft sql_server_2025 | 17.0.1000.7 | — |
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