CVE-2026-66820: 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.
Other sources
SQL Server Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
The attacker must already be authorized, requiring low privileges, and can exploit the vulnerability remotely over a network. No user interaction is required.
What could a successful exploit allow?
A successful SQL injection attack could allow the authorized attacker to elevate privileges. The supplied severity vector indicates high potential impact to confidentiality, integrity, and availability.
Which SQL Server releases are identified as affected?
The listed software includes SQL Server 2017, 2019, 2022, and 2025, including SQL Server 2017 CU 31, SQL Server 2019 CU 32, SQL Server 2022 CU 26, and SQL Server 2025 CU8.