# CVE-2026-66816

## Summary

- **CVE ID:** CVE-2026-66816
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
- **CWE:** CWE-778
- **Published:** Sep 8, 2026
- **Last Modified:** Sep 10, 2026

## Description

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

## Affected Products

- Microsoft — Microsoft SQL Server 2022 (CU 26) (16.0.0.0)
- Microsoft — Microsoft SQL Server 2022 (GDR) (16.0.0)
- Microsoft — Microsoft SQL Server 2025 (CU8) (17.0.0.0)
- Microsoft — Microsoft SQL Server 2025 for x64-based Systems (GDR) (17.0.1050.2)

## References

- [CNA](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66816)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.71%
- **EPSS Percentile:** 51.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._