Executive brief
Microsoft SQL Server contains an integer overflow vulnerability in a network-facing component that allows an authorized attacker to execute arbitrary code remotely. Exploitation requires valid database credentials but could enable a compromised or malicious user account to gain complete system control. This poses a significant risk to organizations using SQL Server, particularly in hybrid or cloud environments where database access may be shared or delegated.
Technical details
The vulnerability is an integer overflow or wraparound condition in Microsoft SQL Server that can be triggered over the network by an authenticated attacker. The flaw exists in a network-accessible component and allows an attacker with valid credentials to execute arbitrary code with the privileges of the SQL Server service. Attack preconditions include network reachability to the SQL Server instance and possession of valid authentication credentials. Microsoft has released patches to address this vulnerability; affected organizations should apply security updates promptly.
Affected products
- Microsoft SQL Server
Timeline
- 2026-09-08: disclosed