Search threats, CVEs… ⌘K
Back to vendor advisories
Microsoft Security Response CenterCVE-2026-66814

Microsoft SQL Server Elevation of Privilege Vulnerability

HighVendor CVSS 8.8 / 10 1 CVE Published Sep 8, 2026 at 7:00 AM UTC
Get alerts for Microsoft SQL Server 2017 for x64-based Systems (GDR)

Summary

Insufficient granularity of access control in SQL Server allows an authorized attacker to elevate privileges over a network.

Products covered

  • Microsoft SQL Server 2017 for x64-based Systems (GDR)

  • Microsoft SQL Server 2019 for x64-based Systems (GDR)

  • Microsoft SQL Server 2017 for x64-based Systems (CU 31)

  • Microsoft SQL Server 2022 for x64-based Systems (GDR)

  • Microsoft SQL Server 2025 for x64-based Systems (GDR)

  • Microsoft SQL Server 2019 for x64-based Systems (CU 32)

  • Microsoft SQL Server 2025 for x64-based Systems (CU8)

  • Microsoft SQL Server 2022 for x64-based Systems (CU 26)

Remediation

Install KB5122775. Install KB5122773. Install KB5122774. Install KB5122771. Install KB5122770. Install KB5122772. Install KB5122769. Install KB5122768.

Vendor-listed fixes

  • 14.0.2130.4

  • 15.0.2190.7

  • 14.0.3550.4

  • 16.0.1200.5

  • 17.0.1135.8

  • 15.0.4490.9

  • 17.0.4085.5

  • 16.0.4275.2

CVEs in this advisory 1

CVE-2026-66814

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.

Keep investigating
See every advisory from this vendor