High7.2Microsoft Server

High [CVE-2026-20803] Microsoft SQL Server Elevation of Privilege Vulnerability

This high-severity Microsoft Server advisory covers CVE-2026-20803 affecting Microsoft SQL Server 2022 (GDR), Microsoft SQL Server 2022 for x64-based Systems (CU 22), Microsoft SQL Server 2025 for x64-based Systems (GDR).

CVE-2026-20803 Published Jan 13, 2026Updated by vendor Jul 30, 2026

CVE-2026-20803

Affected products & platforms

Microsoft ServerSQL Server

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Summary

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

Affected products named by the advisory: Microsoft SQL Server 2022 (GDR); Microsoft SQL Server 2022 for x64-based Systems (CU 22); Microsoft SQL Server 2025 for x64-based Systems (GDR).

Affected versions

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

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

16.0.1165.1
16.0.4230.2
17.0.1050.2

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation

Upgrade to a fixed release: 16.0.1165.1, 16.0.4230.2, 17.0.1050.2. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed for the summary, affected/fixed versions and remediation guidance it provides.
Microsoft Server
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-20803 instead of the raw feed document.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-20803NVD CVE.org MITRE

Official resources

MSRC Security Update Guide
Official documentation
Filter by this CVE for per-product KB numbers, severity and exploitability assessment.

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