CVE-2026-112718: Microsoft Office Word heap-based buffer overflow

CVE-2026-112718 · Severity: high · CVSS 8.8 · Published 2026-11-10

Microsoft Office Word, used by millions for document creation and editing, contains a heap-based buffer overflow vulnerability. An attacker can exploit this flaw over a network to execute arbitrary code on a victim's system, potentially leading to data theft, system compromise, or malware installation.

Technologies: Microsoft Office Word. Vendors: Microsoft.

Quick answers

Is CVE-2026-112718 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-112718 being exploited in the wild.
How severe is CVE-2026-112718?
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-2026-112718?
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-2026-112718 attacked?
It is attacked over the network.
Am I affected by CVE-2026-112718?
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 in Microsoft Office Word allows remote code execution via network attack vector. The vulnerability permits an unauthenticated attacker to execute arbitrary code with the privileges of the user running Word. A fix is available from Microsoft.

Affected products

  • Microsoft Office Word

Timeline

  • 2026-11-10: disclosed

References

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