CVE-2026-113759: Microsoft Office Word use-after-free remote code execution

CVE-2026-113759 · Severity: high · CVSS 7.8 · Published 2026-11-10

Microsoft Office Word, a widely-used document editing application found in most corporate environments, contains a use-after-free vulnerability that allows an attacker to execute arbitrary code with local access. An attacker who tricks a user into opening a malicious Word document could gain code execution at the privilege level of the user, potentially leading to data theft, system compromise, or lateral movement within a network.

Technologies: Microsoft Office Word. Vendors: Microsoft.

Quick answers

Is CVE-2026-113759 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-113759 being exploited in the wild.
How severe is CVE-2026-113759?
High severity, with a CVSS score of 7.8, published 10 November 2026.
Which products and versions are affected?
Microsoft Office Word.
Is there a fix for CVE-2026-113759?
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-2026-113759 attacked?
It is attacked with local access, in a web application.
Am I affected by CVE-2026-113759?
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 use-after-free flaw in Microsoft Office Word's memory management allows code execution when processing specially crafted documents. The vulnerability requires user interaction (opening a malicious document) and local execution context; it has not been observed exploited in the wild. The fix is available from Microsoft.

Affected products

  • Microsoft Office Word

Timeline

  • 2026-11-10: disclosed

References

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