Heap-Based Buffer Overflow in Microsoft SQL Server
CVE-2026-70189

6.7MEDIUM

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-2026-70189?

A heap-based buffer overflow vulnerability in Microsoft SQL Server permits an authorized attacker to execute arbitrary code locally. This exploit can lead to unauthorized access and system compromise, emphasizing the importance of timely updates and security patches. Users are encouraged to review vendor advisories and apply necessary fixes to mitigate 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:
6.7
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.