Heap-Based Buffer Overflow in SQL Server by Microsoft
CVE-2026-88082

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-2026-88082?

A heap-based buffer overflow vulnerability in Microsoft SQL Server can be exploited by an authorized attacker to elevate their privileges locally, compromising the security of the system. This flaw allows for unauthorized access to perform actions that would typically require higher-level permissions, creating significant security risks. Timely updates and patches are essential to mitigate this vulnerability and protect sensitive data.

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

.