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

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. 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

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