CVE-2026-66309

Received Received - Intake

Improper Access Control in Azure SQL Database

Publication date: 2026-08-20

Last updated on: 2026-08-20

Assigner: Microsoft Corporation

Description

Improper access control in Azure SQL Database allows an authorized attacker to elevate privileges over a network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-20

Last Modified

2026-08-20

Generated

2026-08-21

AI Q&A

2026-08-21

EPSS Evaluated

N/A

NVD

CVE-2026-66309

EUVD

EUVD-2026-63622

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	azure_sql_database	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper access control issue in Azure SQL Database. An authorized attacker can exploit it over a network to elevate their privileges beyond what they are supposed to have.

Impact Analysis

An attacker could gain unauthorized access to sensitive data, modify or delete information, or perform actions that require higher-level permissions. This could lead to data breaches, loss of data integrity, or unauthorized system changes.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, or other regulations due to unauthorized data access or exposure. Organizations may face legal penalties, fines, or reputational damage if such breaches occur.

Mitigation Strategies

Apply the latest security patches from Microsoft for Azure SQL Database. Review and restrict database access permissions to least privilege. Monitor database logs for unusual privilege escalation attempts.

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