Equation Editor in Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allows a remote code execution vulnerability due to the way objects are handled in memory, aka "Microsoft Office Memory Corruption Vulnerability".
https://www.tenable.com/cyber-exposure/tenable-2022-threat-landscape-report
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0798
https://0patch.blogspot.com/2018/01/bringing-abandoned-equation-editor-back.html