# CVE-2026-116925: Microsoft Office Word heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-116925-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-2026-116925 · Severity: high · CVSS 8.8 · Published 2026-11-10

Microsoft Office Word is a widely-used document editing application. A heap buffer overflow vulnerability allows an attacker to execute arbitrary code on a user's computer by sending a malicious Word document over a network, potentially giving the attacker full control of the system.

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

## Quick answers

**Is CVE-2026-116925 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116925 being exploited in the wild.

**How severe is CVE-2026-116925?** 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-2026-116925?** 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-2026-116925 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-116925?** 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's document parsing functionality allows remote code execution when processing a specially crafted Word file. The vulnerability can be triggered via network delivery of a malicious document without requiring user authentication, though user interaction (opening the document) is likely needed. Successful exploitation grants the attacker code execution at the privilege level of the user running Word.

## Affected products

- Microsoft Office Word

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-116925](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-116925)

## Related threats

- [Microsoft Office Word buffer over-read information disclosure](https://junglewise.ai/threats/cve-2026-124233-buffer-over-read-in-microsoft-office-word-allows-an-unauthorized)
- [Microsoft Office Word use of uninitialized resource](https://junglewise.ai/threats/cve-2026-124185-use-of-uninitialized-resource-in-microsoft-office-word-allows-an)
- [Microsoft Office Word heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-123394-heap-based-buffer-overflow-in-microsoft-office-word-allows-an)
- [Microsoft Office Word heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-116923-heap-based-buffer-overflow-in-microsoft-office-word-allows-an)
- [Microsoft Office Word heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-116722-heap-based-buffer-overflow-in-microsoft-office-word-allows-an)