Note that there are open-source alternatives to Adobe's official Flash Player:
https://en.wikipedia.org/wiki/Gnash
https://en.wikipedia.org/wiki/Lightspark
https://en.wikipedia.org/wiki/Swfdec
They haven't been updated to support the latest features, but could be a good solution for those wanting to play old Flash games and the like. The chances that they have the same vulnerabilities as Adobe's implementation is low.