These updates address critical vulnerabilities that could potentially allow an attacker to take control of the affected system.
Adobe has released security updates for Adobe Acrobat DC and Reader DC, for Windows.
Available via the program's internal updater: Help / Check for Updates ; alternatively:
For Reader DC (Document Cloud), or other Reader versions for Windows, you can locate your appropriate update here: https://www.adobe.com/support/downloads/product.jsp?product=10&platform=Windows
For Acrobat DC for Windows, you can locate your appropriate update here: http://www.adobe.com/support/downloads/product.jsp?product=1&platform=Windows
Windows 7 Pro SP1 (64-bit), avast! v17 Free, MBAM3 Pro, Windows Firewall, OpenDNS Family Shield, SpywareBlaster, MVPS HOSTS file, MBAE Premium, MCShield, WinPatrol PLUS, SAS (on-demand scanner), Zemana AntiLogger Free, IE11 & Firefox (both using WOT [IE set to WARN, FF set to BLOCK]), uBlock Origin, CryptoPrevent.
[I believe computer-users who sandbox (Sandboxie) are acting prudently.]