CVE-2018-0802

CVE-2018-0802 is a high-severity (CVSS 7.8) vulnerability in Microsoft Office. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

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 vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

• http://www.securityfocus.com/bid/102347
• http://www.securitytracker.com/id/1040153
• https://0patch.blogspot.com/2018/01/the-bug-that-killed-equation-editor-how.html
• https://github.com/rxwx/CVE-2018-0802
• https://github.com/zldww2011/CVE-2018-0802_POC
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0802
• https://research.checkpoint.com/another-office-equation-rce-vulnerability/
• http://www.securityfocus.com/bid/102347