CVE-2026-67636: Microsoft SQL Server Remote Code Execution Vulnerability

Overview

Severity

Critical (CVSS 9)

CVSS Vector

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

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Unlikely

Patch Tuesday

2026-Sep

Released

2026-09-08

Last Updated

2026-09-17

EPSS Score

0.71% (percentile: 52.9%)

Description

Out-of-bounds read in SQL Server allows an unauthorized attacker to execute code over a network.

FAQ

According to the CVSS metric, the attack complexity is high (AC:H). What does this mean for this vulnerability? An attacker would need specific conditions to be in place (i.e. particular protocol settings, or configurations, etc.) before an attack could succeed, which reduces the likelihood of widespread or opportunistic exploitation.

Affected Products (6)

SQL Server

• Microsoft SQL Server 2019 for x64-based Systems (GDR)
• Microsoft SQL Server 2022 for x64-based Systems (GDR)
• Microsoft SQL Server 2025 for x64-based Systems (GDR)
• Microsoft SQL Server 2019 for x64-based Systems (CU 32)
• Microsoft SQL Server 2022 for x64-based Systems (CU 26)
• Microsoft SQL Server 2025 for x64-based Systems (CU8)

Security Updates (6)

• 5122773
• 5122771
• 5122770
• 5122772
• 5122768
• 5122769

Acknowledgments

Microsoft Red Team

Revision History

• 2026-09-08: Information published.
• 2026-09-16: The CVSS vector string was update to reflect that an attacker does not require any privileges to successfully exploit this vulnerability (PR:N). This is an informational change only.
• 2026-09-17: The FAQs have been updated for this CVE