CVE-2026-67381: Microsoft SQL Server Elevation of Privilege Vulnerability
Heap-based buffer overflow in SQL Server allows an authorized attacker to elevate privileges over a network.
Other sources
Microsoft SQL Server Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must be authorized to access the affected SQL Server instance and must be able to reach it over the network. The vulnerability does not describe exploitation by an unauthenticated attacker.
What is the impact if exploitation succeeds?
Successful exploitation allows the authorized attacker to elevate privileges. The supplied severity vector indicates high impacts to confidentiality, integrity, and availability.
Which SQL Server releases are listed as affected?
The listed products are Microsoft SQL Server 2017, SQL Server 2019, SQL Server 2022, and SQL Server 2025, including SQL Server 2017 CU 31, SQL Server 2019 CU 32, SQL Server 2022 CU 26, and SQL Server 2025 CU8.