Adobe Reader 9.3.3 -

Addressed the CVE-2010-1297 vulnerability, which was a known zero-day vulnerability in how Acrobat handled certain file objects, allowing for remote code execution.

A memory corruption vulnerability involving Flash content that was actively being exploited.

One of the most touted features of the version 9 architecture was the ability to view PDF Portfolios. This allowed creators to bundle multiple files—Word documents, Excel spreadsheets, images, and other PDFs—into a single, navigable container. Adobe Reader 9.3.3 allowed users to navigate these complex packages without needing the full, paid version of Acrobat.