If anything it’s DOCX itself that was the vector!
Understanding DOCX Malware and Hidden Threats
https://cloudmersive.com/article/Understanding-DOCX-Malware-...
Hackers using Weaponized Office Document to Exploit Windows Search RCE
https://cybersecuritynews.com/office-document-to-exploit-win...
If anything it’s DOCX itself that was the vector!