Heap-based buffer overflow in Microsoft SQL Server - CVE-2026-116933
Published: November 11, 2026
Vulnerability identifier: #VU164996
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-116933
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to execute arbitrary code in the SQL Server service context.
The vulnerability exists due to a heap-based buffer overflow in Microsoft SQL Server when processing database or backup files. A remote privileged user can use database restore or similar administrative permissions to cause the server to process a specially crafted database or backup file over the network to execute arbitrary code in the SQL Server service context.
Affected software
Microsoft SQL Server
How to mitigate CVE-2026-116933
Install security update from vendor's website.
Microsoft SQL Server - addressed in versions 16.0.1220.3, 16.0.4315.2, 17.0.1155.3, 17.0.5015.4, 17.0.5045.3