Heap-Based Buffer Overflow in Microsoft SQL Server
CVE-2026-85919

7HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sql Server 2019 (gdr)
Microsoft Sql Server 2019 For X64-based Systems (cu32)
Microsoft Sql Server 2022 (gdr)
Microsoft Sql Server 2022 For X64-based Systems (cu27)
Vendor
CVE Published:
13 October 2026

What is CVE-2026-85919?

A heap-based buffer overflow vulnerability in Microsoft SQL Server allows an authorized attacker to gain elevated privileges locally. This flaw can be exploited by manipulating data in memory, potentially leading to unauthorized access and control over the SQL Server environment. It is crucial for organizations to apply the latest patches and updates to safeguard against this vulnerability, ensuring that their SQL Server installations remain secure.

Affected Version(s)

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

Microsoft SQL Server 2019 for x64-based Systems (CU32) x64-based Systems 15.0.4003.23 < 15.0.4500.2

Microsoft SQL Server 2022 (GDR) x64-based Systems 16.0.0 < 16.0.1210.3

References

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

CVSS V3.1

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.