# CVE-2018-0802: Microsoft Office Memory Corruption Vulnerability

Source: https://junglewise.ai/threats/cve-2018-0802-microsoft-office-memory-corruption-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2018-0802 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2021-11-03

Equation Editor in Microsoft Office contains a memory corruption vulnerability due to improper object handling in memory. A remote attacker can exploit this by convincing a user to open a specially crafted file, resulting in remote code execution 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-2018-0802 exploited in the wild?** Yes. CVE-2018-0802 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

**How severe is CVE-2018-0802?** Critical severity, with a CVSS score of 7.8, published 3 November 2021.

**Which products and versions are affected?** Microsoft Office 2007 Service Pack 3; Microsoft Office 2010 Service Pack 2; Microsoft Office 2013 Service Pack 1; Microsoft Office 2016; and 5 more.

**Is there a fix for CVE-2018-0802?** 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-2018-0802 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2018-0802?** 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 2007 Service Pack 3
- Microsoft Office 2010 Service Pack 2
- Microsoft Office 2013 Service Pack 1
- Microsoft Office 2016
- Microsoft Word 2007 Service Pack 3
- Microsoft Word 2010 Service Pack 2
- Microsoft Word 2013 Service Pack 1
- Microsoft Word 2016
- Microsoft Office Compatibility Pack Service Pack 3

## Timeline

- 2018-01-09: disclosed: Initial Microsoft advisory publication date based on CVE ID and external references.
- 2021-11-03: kev added: Added to CISA's Known Exploited Vulnerabilities Catalog.
- 2021-11-03: exploited: Confirmed as exploited in the wild.

## 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)