Microsoft SQL Server Remote Code Execution Vulnerability

Out-of-bounds read in SQL Server allows an authorized attacker to execute code over a network.

Read the vendor bulletin Get alerts for Microsoft SQL Server 2019 for x64-based Systems (GDR)

8.5CVSS out of 10Critical severity

Scope

What the vendor says is affected

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)
Microsoft SQL Server 2019 for x64-based Systems (CU 32)
Microsoft SQL Server 2022 for x64-based Systems (CU 26)
Microsoft SQL Server 2025 for x64-based Systems (CU8)

Versions the vendor lists as fixed

15.0.2190.7
16.0.1200.5
17.0.1135.8
15.0.4490.9
16.0.4275.2
17.0.4085.5

Next step

What the vendor recommends

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

Review the complete instructions on the vendor's site

Timeline

When this advisory changed

Sep 8, 2026 at 7:00 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Sep 8, 2026 at 7:15 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Sep 13, 2026 at 2:40 AM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-67636View CVSS, KEV, EPSS, and threat context

Source

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Vendor: Microsoft Security Response Center
Advisory ID: CVE-2026-67636
Last source check: Sep 13, 2026 at 2:40 AM UTC

Open the official bulletin How SecurityAlert builds this record

Your environment

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Test the update or mitigation through your normal change process.

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

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What the vendor says is affected

Versions the vendor lists as fixed

What the vendor recommends

When this advisory changed

CVEs named in this advisory

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