CVE-2026-65669: Microsoft SQL Server Elevation of Privilege Vulnerability

Overview

Severity

Critical (CVSS 9.6)

CVSS Vector

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

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Sep

Released

2026-09-08

Description

Improper neutralization of special elements in output used by a downstream component ('injection') in SQL Server allows an unauthorized attacker to elevate privileges over a network.

FAQ

How could an attacker exploit this vulnerability? An attacker could convince a user to submit specially crafted instructions to SQL Copilot in SQL Server Management Studio. Successful exploitation could bypass intended read-only restrictions and allow database data to be accessed or modified using the connected user's permissions. User interaction is required.

Affected Products (1)

Windows

• SQL Server Management Studio 22

Security Updates (1)

• Release Notes

Acknowledgments

<a href="https://twitter.com/wunderwuzzi23">Johann Rehberger</a> with https://embracethered.com/

Revision History

• 2026-09-08: Information published.