CVE-2026-111286: Microsoft Office use after free remote code execution

CVE-2026-111286 · Severity: high · CVSS 7.5 · Published 2026-11-10

Microsoft Office is a suite of productivity applications used by millions of organizations worldwide. A use-after-free vulnerability allows an attacker to execute arbitrary code on a user's computer via a malicious Office document or network interaction, potentially leading to data theft or system compromise.

Technologies: Microsoft Office. Vendors: Microsoft.

Quick answers

Is CVE-2026-111286 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-111286 being exploited in the wild.
How severe is CVE-2026-111286?
High severity, with a CVSS score of 7.5, published 10 November 2026.
Which products and versions are affected?
Microsoft Office.
Is there a fix for CVE-2026-111286?
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-2026-111286 attacked?
It is attacked over the network.
Am I affected by CVE-2026-111286?
Check whether you run Microsoft Office. 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 vulnerability in Microsoft Office permits remote code execution when processing specially crafted input over a network. The vulnerability allows an attacker to gain code execution without requiring authentication or user interaction beyond opening a file. A patch is available from Microsoft.

Affected products

  • Microsoft Office

Timeline

  • 2026-11-10: disclosed

References

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