# CVE-2026-67632: Microsoft SQL Server heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-67632-heap-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-2026-67632 · Severity: high · CVSS 8.8 · Published 2026-11-10

SQL Server, Microsoft's database management system, contains a heap-based buffer overflow vulnerability that allows an authenticated attacker to execute arbitrary code remotely. An attacker with valid database credentials could exploit this flaw to compromise the database server, potentially exposing or modifying sensitive business data.

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

## Quick answers

**Is CVE-2026-67632 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-67632 being exploited in the wild.

**How severe is CVE-2026-67632?** 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-2026-67632?** 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-2026-67632 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-67632?** 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 heap-based buffer overflow in SQL Server allows an authenticated attacker to execute arbitrary code via network communication. The vulnerability requires valid authentication credentials and network access to the SQL Server instance. A successful exploit grants the attacker code execution at the SQL Server process privilege level.

## Affected products

- Microsoft SQL Server

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67632](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67632)

## Related threats

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- [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)