CVE-2026-83945: Microsoft SQL Server Remote Code Execution Vulnerability
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.
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 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 17.0.1145.4Patch KB5128492
Event History
Frequently Asked Questions
What access would an attacker need to exploit this issue?
The attacker must already be authorized and have high privileges on the affected SQL Server environment. The attack can be performed over the network and does not require user interaction.
How difficult is exploitation expected to be?
The vulnerability is rated as having high attack complexity, indicating that exploitation requires conditions beyond simply reaching the SQL Server service.
What could happen after successful exploitation?
Successful exploitation could have high impact on confidentiality, integrity, and availability, in addition to allowing code execution.