CVE-2026-108444: Microsoft Office heap-based buffer overflow

CVE-2026-108444 · Severity: high · CVSS 8.8 · Published 2026-10-15

Microsoft Office contains a heap-based buffer overflow vulnerability that allows an attacker to execute arbitrary code on a user's computer over a network. An attacker could exploit this flaw by sending a specially crafted document, gaining the ability to run malware, steal data, or take over the affected system without requiring user credentials.

Technologies: Microsoft Office. Vendors: Microsoft.

Quick answers

Is CVE-2026-108444 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-108444 being exploited in the wild.
How severe is CVE-2026-108444?
High severity, with a CVSS score of 8.8, published 15 October 2026.
Which products and versions are affected?
Microsoft Office.
Is there a fix for CVE-2026-108444?
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-2026-108444 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-108444?
Check whether you run Microsoft Office. 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 Office allows network-based remote code execution without requiring user authentication. The vulnerability exists in Office document processing and can be triggered by a maliciously crafted file sent over the network. Successful exploitation grants an attacker arbitrary code execution on the target system.

Affected products

  • Microsoft Office

Timeline

  • 2026-10-15: disclosed

References

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