Acrobat Reader Xi- 11.0.09

Version 11.0.09 included critical fixes for "use-after-free" and "heap overflow" vulnerabilities that could lead to unauthorized code execution. It utilized a "Protected Mode" sandbox to isolate PDF processes from the rest of the operating system.

Technically, Adobe does not host older versions on its public website. However, legitimate archival services like and FileHippo retain copies. acrobat reader xi- 11.0.09