CVE-2026-88089: Microsoft SQL Server Remote Code Execution Vulnerability
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code locally.
Other sources
Microsoft SQL Server Remote Code Execution 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 16.0.4305.5Patch KB5126934 - 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 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 16.0.1210.3Patch KB5128493 - 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
Event History
Frequently Asked Questions
Is this exposed to unauthenticated or remote attackers?
The available scoring indicates local attack vector and high privileges required. The data does not indicate that unauthenticated or network-only exploitation is possible.
Which SQL Server releases are identified as affected?
The listed software includes Microsoft SQL Server 2017, 2019 CU32, 2022 and CU27, and 2025 including CU8 and CU9. The data does not identify fixed versions or update guidance beyond the referenced Microsoft advisory.
What could exploitation allow?
Successful exploitation could allow local code execution. The supplied vector also rates confidentiality, integrity, and availability impacts as high.