CVE-2026-67643

A heap-based buffer overflow in Microsoft SQL Server allows remote code execution over a network.

This critical vulnerability enables an attacker to execute arbitrary code remotely, posing a severe risk to DIB organizations relying on SQL Server for sensitive data. The failure stems from a heap-based buffer overflow, which is a classic but dangerous memory corruption flaw. DIB orgs must ensure SQL Server is patched immediately and monitor for exploitation attempts, as this type of vulnerability can lead to full system compromise and data exfiltration.

Shame score — A critical remote code execution vulnerability in a widely deployed database server represents a severe, avoidable security failure that could lead to mass data breaches and system compromise.