Microsoft · Office
CVE-2018-0802
Microsoft Office Memory Corruption Vulnerability
What it is
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.
CISA: Microsoft Office contains a memory corruption vulnerability due to the way objects are handled in memory. Successful exploitation allows for remote code execution in the context of the current user. This vulnerability is known to be chained with CVE-2018-0798.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: May 3, 2022
- Added to the CISA list
- November 3, 2021
- Published
- January 10, 2018
- Severity
- High 7.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 93% in the top 0.2% of all known vulnerabilities
- Weakness
- CWE-787
- More details
- NVD · CVE.org · CISA
All references (7)
- 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/
More exploited flaws from Microsoft
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Apr 14, 2026 | Remote Code Execution | Office | High 8.8 | 43% |
| Feb 10, 2026 | Word Reliance on Untrusted Inputs in a Security Decision | Office | High 7.8 | 1.6% |
| Jan 26, 2026 | Security Feature Bypass | Office | High 7.8 | 71% |
| Jan 7, 2026 | PowerPoint Code Injection | Office | High 8.8 | 67% |
| Aug 12, 2025 | Excel Remote Code Execution | Office | High 8.8 | 43% |
| Mar 14, 2023 | Outlook Privilege Escalation | Office | Critical 9.8 | 97% |
| Feb 14, 2023 | Publisher Security Feature Bypass | Office | High 7.3 | 12% |
| Jun 8, 2022 | Object Record Corruption | Office | High 7.8 | 53% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.