Sep 2026: Microsoft SQL Server Security Feature Bypass Vulnerability
CVE-2026-66816 Published on September 8, 2026
Microsoft SQL Server Security Feature Bypass Vulnerability
Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.
Weakness Type
Insufficient Logging
When a security-critical event occurs, the software either does not record the event or omits important details about the event when logging it. When security-critical events are not logged properly, such as a failed login attempt, this can make malicious behavior more difficult to detect and may hinder forensic analysis after an attack succeeds.
Products Associated with CVE-2026-66816
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Affected Versions
Microsoft SQL Server 2022 (CU 26):- 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.