Heap-Based Buffer Overflow Vulnerability in SQL Server by Microsoft
CVE-2026-68883

8.5HIGH

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:
13 October 2026

What is CVE-2026-68883?

A heap-based buffer overflow vulnerability has been identified in Microsoft SQL Server, allowing authorized attackers to escalate their privileges through network exploitation. This issue can lead to unauthorized access and control over the affected systems, making timely updates and security practices essential to mitigate potential risks.

Affected Version(s)

Microsoft SQL Server 2017 (GDR) x64-based Systems 14.0.0 < 14.0.2140.2

Microsoft SQL Server 2017 for x64-based Systems (CU31) x64-based Systems 14.0.3006.16 < 14.0.3560.2

Microsoft SQL Server 2019 (GDR) x64-based Systems 15.0.0 < 15.0.2200.2

References

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

CVSS V3.1

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.