# CVE-2026-116699: Microsoft WDAC OLE DB Provider heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-116699-heap-based-buffer-overflow-in-microsoft-wdac-ole-db-provider-for  
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-2026-116699 · Severity: medium · CVSS 6.5 · Published 2026-11-10

Microsoft's WDAC OLE DB Provider for SQL, a database connectivity component, contains a heap-based buffer overflow vulnerability that allows an attacker to execute arbitrary code remotely over a network. An attacker who can send specially crafted data to the vulnerable component could gain complete control of the affected system without needing valid credentials.

Technologies: [Microsoft WDAC OLE DB provider for SQL](https://junglewise.ai/threats/technologies/wdac-ole-db-provider-for-sql). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-116699 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116699 being exploited in the wild.

**How severe is CVE-2026-116699?** Medium severity, with a CVSS score of 6.5, published 10 November 2026.

**Which products and versions are affected?** Microsoft WDAC OLE DB Provider for SQL.

**Is there a fix for CVE-2026-116699?** 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-2026-116699 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-116699?** Check whether you run Microsoft WDAC OLE DB provider for SQL. 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 exists in the WDAC OLE DB Provider for SQL when processing specially crafted network requests. The vulnerability allows remote code execution without prior authentication, with attack vector over the network. The exact preconditions and affected versions are not detailed in the available advisory text.

## Affected products

- Microsoft WDAC OLE DB Provider for SQL

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-116699](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-116699)

## Related threats

- [Microsoft WDAC OLE DB provider for SQL heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-88222-heap-based-buffer-overflow-in-microsoft-wdac-ole-db-provider-for)
- [Microsoft WDAC OLE DB provider for SQL heap buffer overflow](https://junglewise.ai/threats/cve-2026-85839-heap-based-buffer-overflow-in-microsoft-wdac-ole-db-provider-for)
- [Microsoft WDAC OLE DB provider for SQL heap buffer overflow](https://junglewise.ai/threats/cve-2026-85838-heap-based-buffer-overflow-in-microsoft-wdac-ole-db-provider-for)
- [Microsoft WDAC OLE DB provider heap buffer overflow](https://junglewise.ai/threats/cve-2026-72933-microsoft-wdac-ole-db-provider-heap-buffer-overflow)