Heap-based Buffer Overflow in Microsoft SQL Server
CVE-2026-116942

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sql Server 2017 For X64-based Systems (cu31)
Microsoft Sql Server 2019 (gdr)
Microsoft Sql Server 2019 For X64-based Systems (cu32)
Microsoft Sql Server 2022 (gdr)
Vendor
CVE Published:
10 November 2026

What is CVE-2026-116942?

A heap-based buffer overflow vulnerability in Microsoft SQL Server enables an attacker with proper authorization to execute arbitrary code over a network. This flaw poses significant risks, allowing exploitation in various scenarios if proper safeguards are not in place. It is crucial for organizations using affected versions of SQL Server to apply security patches and updates provided by Microsoft to mitigate this vulnerability.

Affected Version(s)

Microsoft SQL Server 2017 for x64-based Systems (CU31) x64-based Systems 14.0.3006.16 < 14.0.3570.2

Microsoft SQL Server 2019 (GDR) x64-based Systems 15.0.0 < 15.0.2210.4

Microsoft SQL Server 2019 for x64-based Systems (CU32) x64-based Systems 15.0.4003.23 < 15.0.4510.2

References

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

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.