CVE-2026-20803

Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.

CVSS v3 7.2 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20803	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:microsoft:sql_server_2022:::::::x64:*
	cpe:2.3:a:microsoft:sql_server_2022:::::::x64:*
	cpe:2.3:a:microsoft:sql_server_2025:17.0.1000.7::::::x64:

History

17 Jun 2026, 10:17

Type	Values Removed	Values Added
Summary		(es) Falta de autenticación para una función crítica en SQL Server permite a un atacante autorizado elevar privilegios a través de una red.

16 Jan 2026, 14:35

Type	Values Removed	Values Added
CPE		cpe:2.3:a:microsoft:sql_server_2022:::::::x64:* cpe:2.3:a:microsoft:sql_server_2025:17.0.1000.7::::::x64:
First Time		Microsoft sql Server 2025 Microsoft sql Server 2022 Microsoft
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20803 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20803 - Vendor Advisory

13 Jan 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-13 18:16

Updated : 2026-06-17 10:17

NVD link : CVE-2026-20803

Mitre link : CVE-2026-20803

CVE.ORG link : CVE-2026-20803

JSON object : View

Products Affected

microsoft

sql_server_2025
sql_server_2022

CWE

CWE-306

Missing Authentication for Critical Function

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