# CVE-2017-11826: Microsoft Office Remote Code Execution Vulnerability

Source: https://junglewise.ai/threats/cve-2017-11826-microsoft-office-remote-code-execution-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-03-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2017-11826 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2022-03-03

A remote code execution vulnerability exists in Microsoft Office when the software fails to properly handle objects in memory. An attacker can exploit this by convincing a user to open a specially crafted file, allowing the execution of arbitrary code in the context of the current user.

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

## Quick answers

**Is CVE-2017-11826 exploited in the wild?** Yes. CVE-2017-11826 is known to be exploited in the wild, first recorded on 3 March 2022. Treat it as urgent.

**How severe is CVE-2017-11826?** Critical severity, with a CVSS score of 7.8, published 3 March 2022.

**Which products and versions are affected?** Microsoft Office 2010; Microsoft Word 2007, 2010, 2013, 2016; Microsoft SharePoint Server 2010, 2013, 2016; Microsoft Office Web Apps Server 2010, 2013; and 3 more.

**Is there a fix for CVE-2017-11826?** 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-2017-11826 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2017-11826?** 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.

## Affected products

- Microsoft Office 2010
- Microsoft Word 2007, 2010, 2013, 2016
- Microsoft SharePoint Server 2010, 2013, 2016
- Microsoft Office Web Apps Server 2010, 2013
- Microsoft Office Online Server 2016
- Microsoft Word Viewer
- Microsoft Word Automation Services

## Timeline

- 2017-10-17: disclosed: Initial disclosure and vendor advisory published.
- 2017-11-01: other: Third-party analysis of zero-day exploit published.
- 2022-03-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.

## Related threats

- [Microsoft Office Outlook user warning spoofing vulnerability](https://junglewise.ai/threats/cve-2026-124194-microsoft-office-outlook-missing-user-interaction-for)
- [Microsoft Office heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-122198-heap-based-buffer-overflow-in-microsoft-office-allows-an)
- [Microsoft Office heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-120003-heap-based-buffer-overflow-in-microsoft-office-allows-an)
- [Microsoft Office UI security feature bypass](https://junglewise.ai/threats/cve-2026-119998-product-ui-does-not-warn-user-of-unsafe-actions-in-microsoft)
- [Microsoft Office heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-116717-heap-based-buffer-overflow-in-microsoft-office-allows-an)