Affects Windows and Mac. It's out there in the wild.
Adobe has released security updates for Adobe Flash Player 11.5.502.146 and earlier versions for Windows and Macintosh, Adobe Flash Player 188.8.131.521 and earlier versions for Linux, Adobe Flash Player 184.108.40.206 and earlier versions for Android 4.x, and Adobe Flash Player 220.127.116.11 and earlier versions for Android 3.x and 2.x. These updates address vulnerabilities that could cause a crash and potentially allow an attacker to take control of the affected system.
Adobe is aware of reports that CVE-2013-0633 is being exploited in the wild in targeted attacks designed to trick the user into opening a Microsoft Word document delivered as an email attachment which contains malicious Flash (SWF) content. The exploit for CVE-2013-0633 targets the ActiveX version of Flash Player on Windows.
Hackers are exploiting a previously unknown and currently unpatched vulnerability in the latest version of Java to surreptitiously infect targets with malware, security researchers said Thursday night.
The critical vulnerability is being exploited to install a remote-access trojan dubbed McRat, researchers from security firm FireEye warned. The attacks work against Java versions 1.6 Update 41 and 1.7 Update 15, which are the latest available releases of the widely used software. The attack is triggered when people with a vulnerable version of the Java browser plugin visit a website that has been booby-trapped with attack code. FireEye researchers Darien Kindlund and Yichong Lin said the exploit is being used against "multiple customers" and that they have "observed successful exploitation."
Disable Java in your browser if you haven't already.