Improper access control in Microsoft SQL Server - CVE-2026-21262
Published: March 10, 2026
Vulnerability identifier: #VU123767
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-2026-21262
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in SQL Server. A remote user can bypass implemented security restrictions and gain elevated privileges on the target system.
Affected software
Microsoft SQL Server
How to mitigate CVE-2026-21262
Install updates from vendor's website.
Microsoft SQL Server - addressed in versions 13.0.6480.4, 13.0.7075.5, 14.0.2100.4, 14.0.3520.4, 15.0.2160.4, 15.0.4460.4, 16.0.1170.5, 16.0.4240.4, 17.0.1105.2, 17.0.4020.2