CVE-2026-68883: 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
Recommended actions to resolve this vulnerability, in priority order.
- 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 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 - 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 17.0.5015.4Patch KB5126967 - 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 17.0.1145.4Patch KB5128492 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.0.2200.2Patch KB5128495
Event History
Frequently Asked Questions
What level of access does an attacker need?
The attacker must be authorized and able to reach the SQL Server instance over the network. No user interaction is required.
Which SQL Server versions should be reviewed?
The affected software list includes Microsoft SQL Server 2017, SQL Server 2019 CU32, SQL Server 2022 and CU27, and SQL Server 2025 including CU8 and CU9.
How feasible is exploitation according to the available scoring data?
The vulnerability is rated high severity with a CVSS score of 8.5. The attack vector is network-based, but the attack complexity is rated high.