Using this on a public-facing website is highly dangerous. Modern browsers have blocked this for years, and Internet Explorer has been officially retired. Use this method only on fully air-gapped legacy systems.
Adobe does not typically offer a standalone "ActiveX" download; instead, the ActiveX control ( adobe reader activex download verified
To develop long, multi-line text fields in a PDF using Adobe, you primarily use rather than the standard Adobe Reader. The ActiveX control for Adobe Reader is typically used for embedding PDF viewing capabilities within other applications, but form creation and property management are handled within the core Acrobat software. Creating and Configuring Long Text Fields Using this on a public-facing website is highly dangerous
Ensure that Protected Mode is active within Adobe Reader settings to isolate the PDF viewer in a secure sandbox. Adobe does not typically offer a standalone "ActiveX"
Ensure that any application loading PDFs via ActiveX pulls the documents over secure https:// connections to prevent man-in-the-middle exploits.