Page last updated at 15:35 GMT, Monday, 7 June 2010

Adobe has acknowledged a "critical" security flaw in its Reader, Acrobat and Flash Player software.

Adobe says the vulnerability potentially enables hackers to take control of affected computer systems.

Users running Windows, Macintosh or Linux might all be open to attack.

http://news.bbc.co.uk/2/hi/technology/10257411.stm