On February 26, Adobe announced version 11.6.602.171 of the Flash player. As usual, Adobe says: “These updates address vulnerabilities that could cause a crash and potentially allow an attacker to take control of the affected system.” The technical details are available in Adobe Security Bulletin APSB13-08.

Microsoft simultaneously announced a Flash update for Internet Explorer 10 on Windows 8, which will be delivered via Windows Update.

Google will no doubt release a new version of Chrome that includes the Flash updates in the next day or so.

Anyone who uses Flash in their web browser should install the appropriate update as soon as possible. That includes anyone who uses Youtube. So basically just about everyone.