Adobe has security updates for Adobe Reader and Acrobat XI for Windows and Macintosh.
Update or Complete Download:
Update checks can be manually activated by choosing Help > Check for Updates.
Adobe Reader XI (11.0.18, Pro and Standard) for Windows is available here: https://www.adobe.com/support/downloads/detail.jsp?ftpID=6101.
Reader DC and other versions are available here: https://www.adobe.com/support/downloads/product.jsp?product=10&platform=Windows
Acrobat for Windows is available here: http://www.adobe.com/support/downloads/product.jsp?product=1&platform=Windows
Note: UNcheck any pre-checked additional options presented with the update. They are not part of the software update and are completely optional.
Release Notes | Acrobat, Reader (http://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotes/DC/dccontinuousoct2016.html#dccontinuousocttwentysixteen)
Security Bulletin (https://helpx.adobe.com/security/products/acrobat/apsb16-33.html)