SQL Server Remote Code Execution Vulnerability
CVE-2026-78456

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sql Server 2022 (cu 26)
Microsoft Sql Server 2022 (gdr)
Vendor
CVE Published:
8 September 2026

What is CVE-2026-78456?

Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.

Affected Version(s)

Microsoft SQL Server 2022 (CU 26) x64-based Systems 16.0.0.0 < 16.0.4275.2

Microsoft SQL Server 2022 (GDR) x64-based Systems 16.0.0 < 16.0.1200.5

References

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

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.