SQL Server Remote Code Execution via Deserialization
Severe, but no confirmed exploitation yet. Schedule remediation in your next patch cycle and apply mitigations if you're exposed.
An unauthenticated attacker, remotely over the network, with no user interaction, can fully compromise the system — steal data, tamper with it and take it offline.
Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
Inferred from the weakness type (CWE) and how the flaw is reached — the techniques an attacker would chain to exploit this. Real-world corroboration appears here as threat intel is folded in.
Generated by Wavense from the CVE record — an immediate mitigation and the permanent fix.
To reduce immediate risk, restrict network access to SQL Server ports (e.g., 1433 TCP) from untrusted sources, allowing connections only from necessary applications and administrative hosts. Implement strict application control policies or host-based firewalls to prevent the execution of unauthorized binaries on the SQL Server host. Enhance security monitoring to detect unusual process activity or anomalous network connections originating from the SQL Server instance.
Apply the vendor-provided security patches for SQL Server addressing CVE-2026-54117 as soon as they become available and testable within your environment. Ensure all affected SQL Server instances are upgraded to a non-vulnerable version or the latest patched release recommended by the vendor. Continuously review and update SQL Server configurations to adhere to current security best practices, including implementing the principle of least privilege for all database accounts and services.
An unauthorized attacker can achieve remote code execution (RCE) on the SQL Server instance by exploiting deserialization of untrusted data. This could lead to full compromise of the database server, allowing for data exfiltration, tampering, or destruction. The business consequences include significant data breaches, severe operational disruption, potential compliance violations, and extensive reputational damage.
Other CVEs affecting sql server 2016
A remote code execution vulnerability exists in Microsoft SQL Server when it incorrectly handles processing of internal functions, aka 'Microsoft SQL Server Remote Code Execution Vulnerability'.
Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.
Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
Out-of-bounds read in SQL Server allows an unauthorized attacker to execute code over a network.
Untrusted pointer dereference in SQL Server allows an unauthorized attacker to execute code over a network.