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.
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):- Version 14.0.0 and below 14.0.2140.2 is affected.
- Version 14.0.3006.16 and below 14.0.3560.2 is affected.
- Version 15.0.0 and below 15.0.2200.2 is affected.
- Version 15.0.4003.23 and below 15.0.4500.2 is affected.
- Version 16.0.0 and below 16.0.1210.3 is affected.
- Version 16.0.4003.1 and below 16.0.4305.5 is affected.
- Version 17.0.4006.2 and below 17.0.5015.4 is affected.
- Version 17.0.1050.2 and below 17.0.1145.4 is affected.