CVE-2026-20803

Microsoft SQL Server Elevation of Privilege Vulnerability

State: Published
Severity: 7.2 High
Published: Jan 13, 2026
Updated: Jul 30, 2026
Reserved: Dec 3, 2025

Description

Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.

Scores

CVSS	Score	Vector	Source
3.1	7.2 High	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
Microsoft SQL Server 2022 (GDR)Microsoft	16.0.0 to before 16.0.1165.1Affected
Microsoft SQL Server 2022 for x64-based Systems (CU 22)Microsoft	16.0.0.0 to before 16.0.4230.2Affected
Microsoft SQL Server 2025 for x64-based Systems (GDR)Microsoft	17.0.1050.2 to before 17.0.1050.2Affected

References

Microsoft SQL Server Elevation of Privilege Vulnerabilityvendor-advisorypatch

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