Deserialization Vulnerability in Microsoft SQL Server
CVE-2026-77484

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sql Server 2019 (cu 32)
Microsoft Sql Server 2019 (gdr)
Microsoft Sql Server 2022 (cu 26)
Microsoft Sql Server 2022 (gdr)
Vendor
CVE Published:
8 September 2026

What is CVE-2026-77484?

A vulnerability exists in Microsoft SQL Server that permits deserialization of untrusted data, enabling authorized attackers to execute arbitrary code over a network. This flaw could lead to significant security risks if exploited, making it essential for users to ensure their systems are updated and protected against potential attacks.

Affected Version(s)

Microsoft SQL Server 2019 (CU 32) x64-based Systems 15.0.0.0 < 15.0.4490.9

Microsoft SQL Server 2019 (GDR) x64-based Systems 15.0.0 < 15.0.2190.7

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

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

.