# CVE-2026-120001: Microsoft Office PowerPoint heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-120001-heap-based-buffer-overflow-in-microsoft-office-powerpoint-allows  
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-2026-120001 · Severity: high · CVSS 8.8 · Published 2026-11-10

Microsoft Office PowerPoint contains a heap-based buffer overflow vulnerability that allows an attacker to execute arbitrary code on a user's computer. An attacker can exploit this vulnerability by sending a specially crafted PowerPoint file to a victim, which when opened triggers the overflow and gives the attacker complete control over the affected system. This poses a significant risk to organizations using PowerPoint for document handling and collaboration.

Technologies: [Microsoft Office PowerPoint](https://junglewise.ai/threats/technologies/office-powerpoint). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-120001 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-120001 being exploited in the wild.

**How severe is CVE-2026-120001?** High severity, with a CVSS score of 8.8, published 10 November 2026.

**Which products and versions are affected?** Microsoft Office PowerPoint.

**Is there a fix for CVE-2026-120001?** 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-2026-120001 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-120001?** Check whether you run Microsoft Office PowerPoint. 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 Microsoft Office PowerPoint's file parsing logic, allowing remote code execution when a malicious presentation file is opened. The vulnerability requires user interaction (opening a file) but no authentication, and can be exploited over a network via file sharing or email attachment. An attacker gains arbitrary code execution with the privileges of the user running PowerPoint.

## Affected products

- Microsoft Office PowerPoint

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-120001](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-120001)

## Related threats

- [Microsoft Office PowerPoint heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-120005-heap-based-buffer-overflow-in-microsoft-office-powerpoint-allows)
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- [Microsoft Office PowerPoint use-after-free code execution](https://junglewise.ai/threats/cve-2026-109487-use-after-free-in-microsoft-office-powerpoint-allows-an)