There’s an exploit in Flash, on all platforms, being actively exploited in the wild. Adobe rushed out an update. See more at Ars Technica. It allows remote code execution, so this one is as bad as it gets.
Installing EMET is a potential mitigation against Flash exploits, so if you’re running Windows, protecting Flash with EMET is an extremely good idea. Uninstalling Flash is an even better idea, but I don’t think HTML5 is quite ready to replace this scourge of computing security just yet.
I noticed that Secunia PSI automatically updated Flash on all of my machines, which was nice.
See, security doesn’t have to be painful.