CVE-2018-0802
Microsoft Office Memory Corruption Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 93.29% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 3 November 2021 · due 3 May 2022 · used in ransomware campaigns
- Weakness
- CWE-787
- Affected
- microsoft/office · microsoft/office compatibility pack · microsoft/word
- Source
- secure@microsoft.com
EPSS 93.3% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2018-0802
References
- http://www.securityfocus.com/bid/102347Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040153Broken Link, Third Party Advisory, VDB Entry
- https://0patch.blogspot.com/2018/01/the-bug-that-killed-equation-editor-how.htmlExploit, Third Party Advisory
- https://github.com/rxwx/CVE-2018-0802Exploit, Third Party Advisory
- https://github.com/zldww2011/CVE-2018-0802_POCThird Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0802Patch, Vendor Advisory
- https://research.checkpoint.com/another-office-equation-rce-vulnerability/Exploit
- http://www.securityfocus.com/bid/102347Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040153Broken Link, Third Party Advisory, VDB Entry
- https://0patch.blogspot.com/2018/01/the-bug-that-killed-equation-editor-how.htmlExploit, Third Party Advisory
- https://github.com/rxwx/CVE-2018-0802Exploit, Third Party Advisory
- https://github.com/zldww2011/CVE-2018-0802_POCThird Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0802Patch, Vendor Advisory
- https://research.checkpoint.com/another-office-equation-rce-vulnerability/Exploit
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0802US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.