#VU121347 Missing Authentication for Critical Function in Microsoft SQL Server - CVE-2026-20803

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Main Vulnerability Database Vulnerabilities #VU121347

#VU121347 Missing Authentication for Critical Function in Microsoft SQL Server - CVE-2026-20803

Published: January 13, 2026


Vulnerability identifier: #VU121347
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-20803
CWE-ID: CWE-306
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Microsoft SQL Server
Software vendor:
Microsoft

Description

The vulnerability allows a remote user to compromise the target system.

The vulnerability exists due to missing authentication for critical function in Microsoft SQL Server. A remote administrator can gain elevated privileges on the target system.


Remediation

Install updates from vendor's website.

External links