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Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

MicrosoftCVE-2026-66816

Insufficient logging in SQL Server

Microsoft

CVE-2026-66816 · Published Sep 8, 2026 · updated Sep 16, 2026

Medium6.5
Fix: upgrade to 16.0.4275.2 or later (4 fixed versions below)
Microsoft advisory

Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.

Affected versions

PackageAffectedFixed in
Microsoft SQL Server 2022 (CU 26)
Product
>= 16.0.0.0, < 16.0.4275.216.0.4275.2
Microsoft SQL Server 2022 (GDR)
Product
>= 16.0.0, < 16.0.1200.516.0.1200.5
Microsoft SQL Server 2025 (CU8)
Product
>= 17.0.0.0, < 17.0.4085.517.0.4085.5
Microsoft SQL Server 2025 for x64-based Systems (GDR)
Product
>= 17.0.1050.2, < 17.0.1135.817.0.1135.8
Details and references
CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-778

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