What is CVE-2026-20803?

CVE-2026-20803 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft SQL Server Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-20803 cover?

CVE-2026-20803 covers the following CVE IDs: CVE-2026-20803. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-20803?

CVE-2026-20803 has a CVSS v3 base score of 7.2, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-20803?

CVE-2026-20803 affects 3 products, including: Microsoft SQL Server 2022 for x64-based Systems (CU 22); Microsoft SQL Server 2022 for x64-based Systems (GDR); Microsoft SQL Server 2025 for x64-based Systems (GDR).

CVE-2026-20803HighCVSS 7.2

Microsoft SQL Server Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-20803 →

📋 Description

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

🎯 Affected products3

Microsoft SQL Server 2022 for x64-based Systems (CU 22)
Microsoft SQL Server 2022 for x64-based Systems (GDR)
Microsoft SQL Server 2025 for x64-based Systems (GDR)

✅ Remediation

KB5073031 (Security Update) — fixed build 16.0.1165.1 KB5073177 (Security Update) — fixed build 17.0.1050.2 KB5072936 (Security Update) — fixed build 16.0.4230.2

🔗 References (7)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20803
patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108527
referencehttps://support.microsoft.com/help/5073031
patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108528
referencehttps://support.microsoft.com/help/5073177
patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108526
referencehttps://support.microsoft.com/help/5072936