CVE-2026-116722: Microsoft Office Word heap-based buffer overflow

CVE-2026-116722 · Severity: high · CVSS 8.8 · Published 2026-11-10

Microsoft Office Word, used for document creation and editing across enterprises, contains a heap-based buffer overflow vulnerability that could allow an attacker to execute arbitrary code on a user's computer. An attacker could exploit this by sending a specially crafted document to a user, leading to code execution with the user's privileges.

Technologies: Microsoft Office Word. Vendors: Microsoft.

Quick answers

Is CVE-2026-116722 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-116722 being exploited in the wild.
How severe is CVE-2026-116722?
High severity, with a CVSS score of 8.8, published 10 November 2026.
Which products and versions are affected?
Microsoft Office Word.
Is there a fix for CVE-2026-116722?
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-2026-116722 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-116722?
Check whether you run Microsoft Office 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 Office Word's document processing code. The vulnerability can be triggered via network delivery of a malicious Word document, allowing remote code execution without requiring user authentication beyond opening the file.

Affected products

  • Microsoft Office Word

Timeline

  • 2026-11-10: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.