CVE-2018-0802: Microsoft Office Memory Corruption Vulnerability

Vulnerability summary

CVE-2018-0802 is a high (CVSS 9.3) Out-of-bounds Write vulnerability in Microsoft Office. It is known to be exploited: CISA lists it, first on 03-11-2021. It has been used in ransomware campaigns. EPSS estimates a 93.29% chance of exploitation in the next 30 days, higher than 99.8% of scored vulnerabilities. 3 public exploits are recorded.

Timeline

1. 10-01-2018
   PublishedVulnerability first disclosed.
2. 03-11-2021
   Added to CISA KEVMicrosoft Office Memory Corruption Vulnerability
3. 03-05-2022
   CISA remediation dueApply updates per vendor instructions.
4. 21-10-2025
   Last modifiedVulnerability information updated.

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.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.