Adobe normally releases patched versions of its main products on the second Tuesday of each month, to coincide with Microsoft’s update schedule. Occasionally they will depart from this schedule, as they have with the new versions of Reader/Acrobat announced on August 29.
The new versions of Reader and Acrobat address sixty-seven vulnerabilities, many of which were discovered by security researchers outside Adobe. All of the vulnerabilities involve either information disclosure or remote code execution.
Anyone who uses Adobe Reader or Acrobat is advised to install the new versions as soon as possible. You can do that by visiting the Acrobat Reader Download Center.