# CVE-2026-116945: Microsoft SQL Server heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-116945-heap-based-buffer-overflow-in-sql-server-allows-an-unauthorized  
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-2026-116945 · Severity: critical · CVSS 9.8 · Published 2026-11-10

A heap-based buffer overflow vulnerability in SQL Server allows attackers to execute arbitrary code on affected systems over the network without requiring authentication. This could lead to complete system compromise, data theft, or disruption of database services that are critical to business operations.

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

## Quick answers

**Is CVE-2026-116945 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116945 being exploited in the wild.

**How severe is CVE-2026-116945?** Critical severity, with a CVSS score of 9.8, published 10 November 2026.

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

**Is there a fix for CVE-2026-116945?** 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-2026-116945 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-116945?** 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 Microsoft SQL Server can be exploited over the network to achieve remote code execution. The vulnerability requires only network connectivity to the SQL Server instance and does not require prior authentication or user interaction.

## Affected products

- Microsoft SQL Server

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-116945](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-116945)

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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)