Heap-Based Buffer Overflow in Microsoft SQL Server
CVE-2026-88085

6.4MEDIUM

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-2026-88085?

A heap-based buffer overflow has been identified in Microsoft SQL Server, where an authorized attacker can exploit this vulnerability to escalate privileges locally. This flaw allows attackers to manipulate memory to gain unauthorized access and perform actions that are generally restricted. Organizations utilizing affected versions of SQL Server should prioritize applying the provided security updates to mitigate this risk.

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:
6.4
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.