Heap-Based Buffer Overflow in Microsoft SQL Server
CVE-2026-116946

8.8HIGH

Key Information:

Vendor

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

What is CVE-2026-116946?

A heap-based buffer overflow vulnerability exists in Microsoft SQL Server, which may allow an authorized attacker to execute malicious code over a network connection. This issue can be exploited to manipulate the server's memory, potentially leading to unauthorized actions or data compromise. Organizations using affected SQL Server versions are encouraged to apply the recommended patches to mitigate this risk.

Affected Version(s)

Microsoft SQL Server 2017 (GDR) x64-based Systems 14.0.0 < 14.0.2150.2

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

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

.