Adobe released unscheduled security updates for Acrobat and Reader for Windows and MacOS. The updates fix two critical vulnerabilities, CVE-2018-16011 and CVE-18-19725. Successful exploitation of the flaws could lead to arbitrary code execution in the context of the current user. The patches are a priority 2, meaning that there are no known exploits for the vulnerabilities; but they exist in products that have historically been at elevated risk, according to Adobe.
Source: https://threatpost.com/adobe-critical-acrobat-reader-flaws/140547/