Microsoft and Adobe recently released several updates to fix critical security flaws, some of which are already being exploited. As always, it is best to make sure you are up to date on any software you use and to apply updates as soon as they are available.

Microsoft released several update bundles to fix dozens of security vulnerabilities in the Windows operating system. Seven of the updates fix what Microsoft calls “critical updates” which are potential exploits that would allows systems to be taken control of by merely visiting infected websites. The updates also fix issues in Internet Explorer, Microsoft Word and Office Web Apps, including Office for Mac.

Adobe’s update is for users of Windows and Mac users and fixes six vulnerabilities in Acrobat, Reader and Flash that would allow hackers to take over affected computer systems. One of these exploits is already in use by hackers.