# CVE-2026-67375: Microsoft SQL Server stack-based buffer overflow privilege escalation

Source: https://junglewise.ai/threats/cve-2026-67375-stack-based-buffer-overflow-in-sql-server-allows-an-authorized  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-67375 · Severity: high · CVSS 8.8 · Published 2026-11-10

A memory vulnerability in Microsoft SQL Server could allow an authenticated attacker to execute code with elevated privileges over the network. This could lead to complete compromise of the database server, including unauthorized access to sensitive data, modifications to business-critical information, or a foothold for further attacks on the network.

Technologies: [Microsoft SQL Server](https://junglewise.ai/threats/technologies/sql-server). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-67375 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-67375 being exploited in the wild.

**How severe is CVE-2026-67375?** High severity, with a CVSS score of 8.8, published 10 November 2026.

**Which products and versions are affected?** Microsoft SQL Server.

**Is there a fix for CVE-2026-67375?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-67375 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-67375?** Check whether you run Microsoft SQL Server. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stack-based buffer overflow exists in SQL Server that can be exploited by an authenticated attacker to elevate privileges via network access. The vulnerability requires prior authentication to the database, but once exploited allows arbitrary code execution with elevated system privileges. A security update from Microsoft addresses this issue.

## Affected products

- Microsoft SQL Server

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67375](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67375)

## Related threats

- [Microsoft SQL Server heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-94513-heap-based-buffer-overflow-in-sql-server-allows-an-authorized)
- [Microsoft SQL Server heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-94511-heap-based-buffer-overflow-in-sql-server-allows-an-authorized)
- [Microsoft SQL Server heap buffer overflow](https://junglewise.ai/threats/cve-2026-88111-heap-based-buffer-overflow-in-sql-server-allows-an-authorized)
- [Microsoft SQL Server privilege escalation via exposed method](https://junglewise.ai/threats/cve-2026-84010-exposed-dangerous-method-or-function-in-sql-server-allows-an)
- [Microsoft SQL Server information disclosure via uninitialized resource](https://junglewise.ai/threats/cve-2026-68783-use-of-uninitialized-resource-in-sql-server-allows-an-authorized)