Additional vulnerabilities continued affecting version 9.3.3 well beyond its release. The JavaScript implementation in Adobe Reader and Acrobat 9.x before 9.5.1 allowed attackers to execute arbitrary code or cause denial of service through unspecified vectors (CVE-2012-0775). Heap-based buffer overflow vulnerabilities (CVE-2012-1525) affected versions before 9.5.2. Even as late as 2013, vulnerabilities continued to be identified in the 9.x branch, with CVE-2013-0627 affecting versions before 9.5.3.
Programs like Sumatra PDF or Foxit Reader offer excellent speed and security without the heavy system resource requirements of older enterprise software. To help you transition safely, please let me know: Adobe Reader 9.3.3
Adobe Reader 9.3.3 was specifically designed to patch a "critical" vulnerability that allowed attackers to remotely take over a system if a user simply opened a rigged PDF file. Additional vulnerabilities continued affecting version 9