CVE-2026-96956: SQL Server Elevation of Privilege Vulnerability
SQL Server Elevation of Privilege Vulnerability
Other sources
Stack-based buffer overflow in SQL Server allows an authorized attacker to elevate privileges over a network.
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 17.0.1145.4Patch KB5128492 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.0.4500.2Patch KB5128494 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.0.2200.2Patch KB5128495 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 14.0.3560.2Patch KB5128496 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 14.0.2140.2Patch KB5128497 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 17.0.5015.4Patch KB5126967 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.1210.3Patch KB5128493 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.4305.5Patch KB5126934
Event History
Frequently Asked Questions
What level of access does an attacker need before attempting exploitation?
The attacker must already be authorized and have high privileges. Exploitation is performed over the network and does not require user interaction, but the attack complexity is rated high.
Which SQL Server releases are listed as affected?
The affected software list includes SQL Server 2017, SQL Server 2017 CU31, SQL Server 2019, SQL Server 2019 CU32, SQL Server 2022, SQL Server 2022 CU27, SQL Server 2025, and SQL Server 2025 CU9.
What could a successful exploit allow?
A successful exploit could allow privilege elevation. The supplied severity vector indicates high potential impact to confidentiality, integrity, and availability.