CVE-2026-112726: Microsoft Office Word heap-based buffer overflow

CVE-2026-112726 · Severity: high · CVSS 8.8 · Published 2026-11-10

Microsoft Office Word, a widely-used word processing application, contains a heap-based buffer overflow vulnerability that allows an attacker to execute malicious code remotely. An attacker could exploit this flaw by sending a specially crafted document over the network, potentially leading to data theft, system compromise, or ransomware installation on affected machines.

Technologies: Microsoft Office Word. Vendors: Microsoft.

Quick answers

Is CVE-2026-112726 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-112726 being exploited in the wild.
How severe is CVE-2026-112726?
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-2026-112726?
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-2026-112726 attacked?
It is attacked over the network.
Am I affected by CVE-2026-112726?
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 logic. The vulnerability is exploitable over the network without requiring authentication or user interaction beyond opening a malicious document. Successful exploitation allows arbitrary code execution in the context of the Word process.

Affected products

  • Microsoft Office Word

Timeline

  • 2026-11-10: disclosed

References

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