Critical MSRC-CVE-2026-67643 1 CVE

Microsoft SQL Server Remote Code Execution Vulnerability

Published Sep 8, 2026 · Updated Sep 17, 2026 · Revision 3

Vendor: Microsoft

Summary

Impact: Remote Code Execution. Microsoft rating: Critical. Not known to be exploited — Exploitation Unlikely. Customer action: Required.

Details

Security updates
16.0.1200.5 — https://support.microsoft.com/help/5122771
17.0.1135.8 — https://support.microsoft.com/help/5122770
16.0.4275.2 — https://support.microsoft.com/help/5122768
17.0.4085.5 — https://support.microsoft.com/help/5122769

Vulnerabilities 1

Critical 9.8

CVE-2026-67643

Microsoft SQL Server Remote Code Execution Vulnerability

Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.

Microsoft Microsoft SQL Server 2022 (GDR) Microsoft SQL Server 2025 for x64-based Systems (GDR) Microsoft SQL Server 2025 (CU8)

Sep 8, 2026

Revision history

2026-09-17 #3
The FAQs have been updated for this CVE
2026-09-16 #2
The CVSS vector string was update to reflect that an attacker does not require any privileges to successfully exploit this vulnerability (PR:N). This is an informational change only.
2026-09-08 #1
Information published.

References

CVE-2026-67643 Microsoft SQL Server Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67643
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss