CVE-2018-0802Equation 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 mem…
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It affects Microsoft Corporation Equation Editor and 3 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022, and it is known to be used in ransomware. Treat that date as your deadline.
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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.
- CVSS
- 7.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-787
- Known exploited
- Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 93.29% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Corporation Equation Editor microsoft:equation_editor (from the name) | Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 | CNA record |
microsoft office microsoft:office | 2007; 2010; 2013; 2016; 2016 | NVD |
microsoft office_compatibility_pack microsoft:office_compatibility_pack | all versions | NVD |
microsoft word microsoft:word | 2007; 2010; 2013; 2013; 2016 | NVD |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0802x-refsource-confirm, patch, vendor-advisory
- https://github.com/rxwx/CVE-2018-0802x-refsource-misc, exploit, third-party-advisory
- http://www.securitytracker.com/id/1040153vdb-entry, x-refsource-sectrack, broken-link, third-party-advisory
- https://0patch.blogspot.com/2018/01/the-bug-that-killed-equation-editor-how.htmlx-refsource-misc, exploit, third-party-advisory
- http://www.securityfocus.com/bid/102347vdb-entry, x-refsource-bid, broken-link, third-party-advisory
- https://github.com/zldww2011/CVE-2018-0802_POCx-refsource-misc, third-party-advisory
- https://research.checkpoint.com/another-office-equation-rce-vulnerability/x-refsource-misc, exploit
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0802us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.