Microsoft has released the April updates to their software. Some of these updates address vulnerabilities that may allow an attacker to take control of a system. This update addresses a Microsoft Office vulnerability that is being exploited in the wild. 
The IT Security Office advises owners of the software listed below update as soon as possible.
Microsoft Security Bulletin Summary for April 2017
Released: April 11, 2017
Additional information about these vulnerabilities can be viewed at:
If you have any questions, please contact the IT Service Center at 303-735-4357 (or 5-HELP from an on-campus phone) or email@example.com. IT Service Center Hours: https://oit.colorado.edu/support/it-service-center.
OIT has defined the following categories to describe the severity of security risks:
URGENT severity represents a broad threat to the entire campus community.
SEVERE severity included remote exploits and worms.
IMPORTANT severity includes virus and local exploits for commonly used services.