# CVE-2026-72933: Microsoft WDAC OLE DB provider heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-72933-microsoft-wdac-ole-db-provider-heap-buffer-overflow  
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-2026-72933 · Severity: high · CVSS 8.8 · Published 2026-09-08

Microsoft's WDAC OLE DB provider for SQL Server is vulnerable to a heap-based buffer overflow that allows attackers to remotely execute code on affected systems without authentication. Exploitation could lead to complete system compromise, data theft, and lateral movement within corporate networks that rely on this database connectivity component.

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-2026-72933 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-72933 being exploited in the wild.

**How severe is CVE-2026-72933?** High severity, with a CVSS score of 8.8, published 8 September 2026.

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

**Is there a fix for CVE-2026-72933?** 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-2026-72933 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-72933?** 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 Microsoft WDAC OLE DB provider for SQL Server. The vulnerability can be triggered remotely without prior authentication by sending specially crafted network packets. Successful exploitation allows an attacker to execute arbitrary code with the privileges of the SQL Server process. The vulnerability is exploitable over the network, making it a high-impact remote code execution risk for any system exposing SQL Server connections to untrusted networks.

## Affected products

- Microsoft WDAC OLE DB provider for SQL

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72933](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72933)

## 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-2026-116699-heap-based-buffer-overflow-in-microsoft-wdac-ole-db-provider-for)