CVE-2026-67642: Microsoft SQL Server 2025

High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days.

Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.

Affected products

• Microsoft SQL Server 2025: before 17.0.1135.8 (fixed in 17.0.1135.8); from 17.0.4006.2, before 17.0.4085.5 (fixed in 17.0.4085.5)

Published 2026-09-08. Last modified 2026-09-15.