CVE-2026-66820

Microsoft · Published September 8, 2026

8.8

CVSS v3.1

HIGH

Patch availableGet patch

Description

SQL Server Elevation of Privilege Vulnerability. Improper neutralization of special elements used in an sql command ('sql injection') in SQL Server allows an authorized attacker to elevate privileges over a network.

Affected Products

Microsoft SQL Server 2017 for x64-based Systems (GDR)
Microsoft SQL Server 2019 for x64-based Systems (GDR)
Microsoft SQL Server 2017 for x64-based Systems (CU 31)
Microsoft SQL Server 2022 for x64-based Systems (GDR)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C