It looks like once again Adobe Flash is opening up a vulnerability on older OS builds for the BlackBerry Z10/Q10 and PlayBook. BlackBerry put out a bulletin about this new Adobe Flash Player vulnerability that is present on older BlackBerry OS builds. The vulnerability was fixed in BlackBerry 10 OS v10.1.0.1880 or later or BlackBerry PlayBook OS v188.8.131.523 or later. If you have an older OS you need to upgrade. Newer OS builds already have a fix.
This is a CVSS score 6.8 vulnerability so its pretty serious and just requires a specially crafted flash file to run in the browser. If you are running an older OS build I recommend upgrading and reading the bulletin from BlackBerry.