Adobe has fixed a vulnerability in its widely used document-viewing program Reader, but the firm is not revealing...
the details of the security flaw.
Because of this, security analysts believe the flaw is serious, and that users should update their systems to the new version - version 8.1.2 - as soon as possible.
The flaw affects PDF documents, which have been at the centre of previous critical security threats involving Windows-based machines.
It is estimated that two-thirds of home users have the free Adobe Reader software on their desktops, to enable them to read PDF documents, so the implications of an unpatched machine could be severe.