Improper Access Control in Azure SQL Database from Microsoft
CVE-2026-66309

9.1CRITICAL

Key Information:

Vendor

Microsoft
Status
Azure Sql Database
Vendor
CVE Published:
20 August 2026

What is CVE-2026-66309?

A vulnerability in Azure SQL Database can allow an authorized attacker to gain elevated privileges over the network due to improper access controls. This security flaw can potentially lead to unauthorized access to sensitive data and critical operations, highlighting the need for robust security measures and immediate attention from system administrators.

Affected Version(s)

Azure SQL Database -

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.