# CVE-2026-67378: Microsoft SQL Server untrusted pointer dereference

Source: https://junglewise.ai/threats/cve-2026-67378-microsoft-sql-server-untrusted-pointer-dereference  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-67378 · Severity: critical · CVSS 9 · Published 2026-09-08

Microsoft SQL Server contains a pointer dereference vulnerability that allows an unauthenticated attacker to execute arbitrary code remotely. This could lead to complete compromise of the database system, including unauthorized access to sensitive customer data, service disruption, and potential lateral movement within a corporate network.

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

## Quick answers

**Is CVE-2026-67378 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-67378 being exploited in the wild.

**How severe is CVE-2026-67378?** Critical severity, with a CVSS score of 9, published 8 September 2026.

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

**Is there a fix for CVE-2026-67378?** 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-2026-67378 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-67378?** 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

The vulnerability involves an untrusted pointer dereference in SQL Server that enables remote code execution. The flaw can be exploited over the network without requiring prior authentication, allowing an attacker to execute arbitrary code with the privileges of the SQL Server process. This is a memory corruption issue that could be triggered through specially crafted network requests. Microsoft has released a security update to address this issue.

## Affected products

- Microsoft SQL Server

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67378](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67378)

## 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)