Adobe no longer develops or releases security updates for this version. Any software vulnerabilities discovered after October 2017 remain unpatched.
is a museum piece—a perfectly functional, fast, and familiar PDF reader that should only be viewed from behind glass (or a firewall). For historians, retro-computing enthusiasts, and industrial control operators, it remains a viable tool. For everyone else, it is a ticking time bomb. adobe reader xi version 11.0.23