CVE-2026-66814

Insufficient granularity of access control in SQL Server allows an authorized attacker to elevate privileges over a network.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

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-2026-66814	Vendor Advisory Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:microsoft:sql_server_2017:::::::x64:*
	cpe:2.3:a:microsoft:sql_server_2017:::::::x64:*
	cpe:2.3:a:microsoft:sql_server_2019:::::::x64:*
	cpe:2.3:a:microsoft:sql_server_2019:::::::x64:*
	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:::::::x64:*
	cpe:2.3:a:microsoft:sql_server_2025:::::::x64:*

History

16 Sep 2026, 11:56

Type	Values Removed	Values Added
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66814 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66814 - Vendor Advisory, Patch
CPE		cpe:2.3:a:microsoft:sql_server_2025:::::::x64:* cpe:2.3:a:microsoft:sql_server_2022:::::::x64:* cpe:2.3:a:microsoft:sql_server_2019:::::::x64:* cpe:2.3:a:microsoft:sql_server_2017:::::::x64:*
First Time		Microsoft Microsoft sql Server 2025 Microsoft sql Server 2019 Microsoft sql Server 2022 Microsoft sql Server 2017

Information

Published : 2026-09-08 18:18

Updated : 2026-09-16 11:56

NVD link : CVE-2026-66814

Mitre link : CVE-2026-66814

CVE.ORG link : CVE-2026-66814

JSON object : View

Products Affected

microsoft

sql_server_2017
sql_server_2022
sql_server_2025
sql_server_2019

CWE

CWE-1220

Insufficient Granularity of Access Control

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