Executive brief
Microsoft SQL Server is a database management system used by organizations to store and manage critical business data. A heap-based buffer overflow vulnerability in SQL Server allows an authorized attacker to execute arbitrary code remotely, potentially enabling data theft, service disruption, or lateral movement within corporate networks.
Technical details
A heap-based buffer overflow exists in Microsoft SQL Server that permits code execution via network access. The vulnerability requires valid authentication credentials, limiting exposure to authorized users or those with database access. An attacker who can authenticate to SQL Server can trigger the overflow through specially crafted input, achieving arbitrary code execution with the privileges of the SQL Server service. The attack vector is network-based and exploitation is possible without additional user interaction beyond normal database operations. Microsoft has released a security update to address this vulnerability.
Affected products
- Microsoft SQL Server
Timeline
- 2026-09-08: disclosed