CVE-2026-20803
published 2026-01-13CVE-2026-20803: Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
PriorityP354high7.2CVSS 3.1
AVNACLPRHUINSUCHIHAH
EPSS
1.24%
65.7th percentile
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_sql_server_2022 | >= 16.0.0 < 16.0.1165.1 | 16.0.1165.1 |
| microsoft | microsoft_sql_server_2022_for_x64-based_systems | >= 16.0.0.0 < 16.0.4230.2 | 16.0.4230.2 |
| microsoft | microsoft_sql_server_2025_for_x64-based_systems | >= 17.0.1050.2 < 17.0.1050.2 | 17.0.1050.2 |
| microsoft | sql_server_2022 | >= 16.0.1000.6 < 16.0.1165.1 | 16.0.1165.1 |
| microsoft | sql_server_2022 | >= 16.0.4003.1 < 16.0.4230.2 | 16.0.4230.2 |
| microsoft | sql_server_2025 | — | — |
| msrc | microsoft_sql_server_2022_for_x64-based_systems | — | — |
| msrc | microsoft_sql_server_2025_for_x64-based_systems | — | — |
CVSS provenance
nvdv3.17.2HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
vendor_msrc7.2HIGH
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GHSA
GHSA-9429-3r47-rwh9: Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network
ghsa_unreviewed·2026-01-13
CVE-2026-20803 [HIGH] CWE-306 GHSA-9429-3r47-rwh9: Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
Microsoft
Microsoft SQL Server Elevation of Privilege Vulnerability
vendor_msrc·2026-01-13·CVSS 7.2
CVE-2026-20803 [HIGH] CWE-306 Microsoft SQL Server Elevation of Privilege Vulnerability
Microsoft SQL Server Elevation of Privilege Vulnerability
Description: Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
FAQ: I am running SQL Server on my system. What action do I need to take?
Update your relevant version of SQL Server. Any applicable driver fixes are included in those updates.
There are GDR and/or CU (Cumulative Update) updates offered for my version of SQL Server. How do I know which update to use?
First, determine your SQL Server version number. For more information on determining your SQL Server version number, see Microsoft Knowledge Base Article 321185 - How to determine the version, edition, and update level of SQL Server and its components.
Second, in the following table, locate your
No detection rules found.
No public exploits indexed.
Bleepingcomputer
Microsoft January 2026 Patch Tuesday fixes 3 zero-days, 114 flaws
blogs_bleepingcomputer·2026-01-13·CVSS 5.5
[MEDIUM] Microsoft January 2026 Patch Tuesday fixes 3 zero-days, 114 flaws
## Microsoft January 2026 Patch Tuesday fixes 3 zero-days, 114 flaws
## Lawrence Abrams
57 Elevation of Privilege vulnerabilities
3 Security Feature Bypass vulnerabilities
22 Remote Code Execution vulnerabilities
22 Information Disclosure vulnerabilities
2 Denial of Service vulnerabilities
5 Spoofing vulnerabilities
When BleepingComputer reports on Patch Tuesday security updates, we only count those released by Microsoft today. Therefore, the number of flaws does not include Microsoft Edge (1 flaw) and Mariner vulnerabilities fixed earlier this month.
To learn more about the non-security updates released today, you can review our dedicated articles on the Windows 11 KB5074109 & KB5073455 cumulative updates and Windows 10 KB5073724 extended security update .
## 3 zero-days, one ex
Wiz
CVE-2026-20803 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 7.2
CVE-2026-20803 [HIGH] CVE-2026-20803 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-20803 :
vulnerability analysis and mitigation
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
Source : NVD
## 7.2
Score
Published January 13, 2026
Severity HIGH
CNA Score 7.2
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 18.7
Exploitation Probability (EPSS) 0.1
Sources
NVD
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2026-01-13
Published