Out-of-Bounds Read in SQL Server from Microsoft
CVE-2026-67645

6.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Microsoft Sql Server 2017 (cu 31)
Microsoft Sql Server 2017 (gdr)
Microsoft Sql Server 2019 (cu 32)
Microsoft Sql Server 2019 (gdr)
Vendor
CVE Published:
8 September 2026

What is CVE-2026-67645?

An out-of-bounds read vulnerability in Microsoft SQL Server could allow an authorized attacker to access sensitive information over a network. This issue arises when the server improperly handles specific requests, potentially allowing attackers to exploit the flaw for unauthorized data disclosure. It is crucial for organizations to apply available patches and updates to safeguard their systems from this vulnerability.

Affected Version(s)

Microsoft SQL Server 2017 (CU 31) x64-based Systems 14.0.0 < 14.0.3550.4

Microsoft SQL Server 2017 (GDR) x64-based Systems 14.0.0 < 14.0.2130.4

Microsoft SQL Server 2019 (CU 32) x64-based Systems 15.0.0.0 < 15.0.4490.9

References

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

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.