# CVE-2026-110056: Microsoft Office Word heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-110056-heap-based-buffer-overflow-in-microsoft-office-word-allows-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-110056 · Severity: high · CVSS 7.8 · Published 2026-11-10

Microsoft Word, a document editing application used across organizations and individuals, contains a heap-based buffer overflow vulnerability that could allow a local attacker to execute arbitrary code. An attacker who tricks a user into opening a malicious document could gain full control of the system and access sensitive data.

Technologies: [Microsoft Word](https://junglewise.ai/threats/technologies/word). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-110056 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-110056 being exploited in the wild.

**How severe is CVE-2026-110056?** High severity, with a CVSS score of 7.8, published 10 November 2026.

**Which products and versions are affected?** Microsoft Word.

**Is there a fix for CVE-2026-110056?** 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-2026-110056 attacked?** It is attacked with local access, in a web application.

**Am I affected by CVE-2026-110056?** Check whether you run Microsoft 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 Word allows local code execution when a specially crafted document is processed. The vulnerability requires user interaction to open a malicious file. Successful exploitation grants an attacker arbitrary code execution in the context of the Word process.

## Affected products

- Microsoft Word

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-110056](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-110056)

## Related threats

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- [Microsoft Word heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-110049-heap-based-buffer-overflow-in-microsoft-office-word-allows-an)