Windows XP SP3 (32-bit), Windows 7, Windows 8/8.1, Windows 10, Windows Server 2008 R2/2012 OS X 10.9, 10.10, 10.11 Processor 1.3 GHz or faster processor RAM 512 MB minimum (1 GB recommended) Hard Disk Space 350 MB of available space End-of-Support and Security Risks
Why do people still seek this version? Compatibility. Modern Adobe Reader DC dropped support for Windows XP and Windows Vista long ago. Reader XI remains one of the last functional PDF readers for these operating systems.
Approximately 380MB to 450MB of available hard-disk space. End of Life (EOL) Warning adobe reader xi version 11.0.23
As of October 15, 2017, Adobe officially ended support for Adobe Acrobat XI and Reader XI, including version 11.0.23.
As mentioned, some legacy systems and banking applications specifically require Reader XI for certificate handling. Windows XP SP3 (32-bit), Windows 7, Windows 8/8
Before installing or deploying Adobe Reader XI version 11.0.23, you must understand the security risks associated with legacy software.
In addition to security patches, version 11.0.23 addressed several functionality issues: Reader XI remains one of the last functional
By the time Adobe reached 11.0.23, they had already released over two dozen patches fixing everything from memory corruption bugs (CVE-2017-11237) to privilege escalation vulnerabilities. Version 11.0.23 was rolled out on as an "out-of-cycle" security update to patch CVE-2018-4878—a critical Flash Player vulnerability that allowed remote code execution via malicious Flash files embedded in PDFs.
: Resolved a bug where images in emails converted to PDF would turn into garbled text.