Sep 2026: Microsoft SQL Server Elevation of Privilege Vulnerability
CVE-2026-66818 Published on September 8, 2026
Microsoft SQL Server Elevation of Privilege Vulnerability
Improper privilege management in SQL Server allows an authorized attacker to elevate privileges over a network.
Weakness Type
Improper Privilege Management
The software does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Products Associated with CVE-2026-66818
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Affected Versions
Microsoft SQL Server 2017 (CU 31):- Version 14.0.0 and below 14.0.3550.4 is affected.
- Version 14.0.0 and below 14.0.2130.4 is affected.
- Version 15.0.0.0 and below 15.0.4490.9 is affected.
- Version 15.0.0 and below 15.0.2190.7 is affected.
- Version 16.0.0.0 and below 16.0.4275.2 is affected.
- Version 16.0.0 and below 16.0.1200.5 is affected.
- Version 17.0.0.0 and below 17.0.4085.5 is affected.
- Version 17.0.1050.2 and below 17.0.1135.8 is affected.