CVE-2026-112724: Microsoft Word heap-based buffer overflow

CVE-2026-112724 · Severity: high · CVSS 8.8 · Published 2026-11-10

Microsoft Word, a widely used document editing application, contains a heap-based buffer overflow vulnerability that allows an attacker to execute arbitrary code on a user's computer. An attacker could exploit this by sending a specially crafted Word document that, when opened, triggers the overflow and grants the attacker the same permissions as the user.

Technologies: Microsoft Word. Vendors: Microsoft.

Quick answers

Is CVE-2026-112724 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-112724 being exploited in the wild.
How severe is CVE-2026-112724?
High severity, with a CVSS score of 8.8, published 10 November 2026.
Which products and versions are affected?
Microsoft Word.
Is there a fix for CVE-2026-112724?
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-2026-112724 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-112724?
Check whether you run Microsoft Word. 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 Word's document parsing logic, allowing remote code execution when a malicious Word document is opened. The vulnerability requires user interaction (opening the document) and network delivery of the payload. Successful exploitation grants the attacker code execution with the privileges of the user opening the file.

Affected products

  • Microsoft Word

Timeline

  • 2026-11-10: disclosed

References

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