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Microsoft Security Response CenterCVE-2026-88086

Microsoft SQL Server Information Disclosure Vulnerability

HighVendor CVSS 5.3 / 10 1 CVE Published Oct 13, 2026 at 7:00 AM UTC

Summary

Out-of-bounds read in SQL Server allows an unauthorized attacker to disclose information over an adjacent network.

Products covered

  • Microsoft SQL Server 2019 for x64-based Systems (CU32)

  • Microsoft SQL Server 2022 for x64-based Systems (CU27)

  • Microsoft SQL Server 2025 for x64-based Systems (CU9)

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

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

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

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

Remediation

Install KB5128494. Install KB5126934. Install KB5126967. Install KB5128495. Install KB5128493. Install KB5128492.

Vendor-listed fixes

  • 15.0.4500.2

  • 16.0.4305.5

  • 17.0.5015.4

  • 15.0.2200.2

  • 16.0.1210.3

  • 17.0.1145.4

CVEs in this advisory 1

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.