CVE-2018-0802
KEVRansomware UseMicrosoft Office Memory Corruption Vulnerability
Description
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.
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 3.1 vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HPublishedJan 10, 2018
Last modifiedJun 17, 2026
Added to KEVNov 3, 2021
Remediation dueMay 3, 2022
References
- securityfocus.com/bid/102347Broken LinkThird Party Advisory
- securitytracker.com/id/1040153Broken LinkThird Party Advisory
- 0patch.blogspot.com/2018/01/the-bug-that-killed-equation-editor-how.htmlExploitThird Party Advisory
- github.com/rxwx/CVE-2018-0802ExploitThird Party Advisory
- github.com/zldww2011/CVE-2018-0802_POCThird Party Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0802PatchVendor Advisory
- research.checkpoint.com/another-office-equation-rce-vulnerability/Exploit
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0802US Government Resource
0 recent articles mention this CVE
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Risk assessment · Critical
Actively exploited and used by ransomware crews. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1638 days
- Ransomware
- Used in known ransomware campaigns
- CVSS
- 7.8 HIGH
- EPSS (30-day exploit probability)
- 93.3% · top 1% of all CVEs
- Weakness
- CWE-787
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
- 4.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.