Oct 2026: Microsoft SQL Server Denial of Service Vulnerability
CVE-2026-94520 Published on October 13, 2026

Microsoft SQL Server Denial of Service Vulnerability
Use of externally-controlled format string in SQL Server allows an authorized attacker to deny service over a network.

Vendor Advisory NVD

Vulnerability Analysis

Exploitation:
NONE
Automatable:
NO
Technical Impact:
PARTIAL

Weakness Type

Use of Externally-Controlled Format String

The software uses a function that accepts a format string as an argument, but the format string originates from an external source.


Products Associated with CVE-2026-94520

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Affected Versions

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): Microsoft SQL Server 2022 (GDR): Microsoft SQL Server 2022 for x64-based Systems (CU27): Microsoft SQL Server 2025 for x64-based Systems (CU9): Microsoft SQL Server 2025 for x64-based Systems (GDR):