Heap-based buffer overflow in Microsoft SQL Server - CVE-2026-94512
Published: October 14, 2026
Vulnerability identifier: #VU155778
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-94512
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code on the server.
The vulnerability exists due to a heap-based buffer overflow in SQL Server when processing network requests. A remote user can send a specially crafted request to execute arbitrary code on the server.
User interaction is not required.
Affected software
Microsoft SQL Server
How to mitigate CVE-2026-94512
Install security update from vendor's website.
Microsoft SQL Server - addressed in versions 14.0.2140.2, 14.0.3560.2, 15.0.2200.2, 15.0.4500.2, 16.0.1210.3, 16.0.4305.5, 17.0.1145.4, 17.0.5015.4