CVE-2026-67631

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

Score

CVSS 3.1 9.8 Critical

Status

Modified - secure@microsoft.com

Published

2026-09-08

Last modified

2026-10-27

Weaknesses

CWE-122

Affected products

• Sql Server 2017 (Microsoft)
• Sql Server 2019 (Microsoft)
• Sql Server 2022 (Microsoft)
• Sql Server 2025 (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67631