The new rules do not mention Islamic State or any other group by name
Hackers can exploit this to steal sensitive data.
EBay spokeswoman Amanda Miller told Reuters those passwords were encrypted and that the company had no reason to believe the hackers had broken the code that scrambled them.
The vulnerability affects customers using Office 2003 and Office 2007 as well as those running Office 2010 on Windows XP and Server 2003.
Companies push out warnings to PCs infected with Bamital.
The problem lies in computer routers and other networking equipment that use a commonly employed standard known as Universal Plug and Play or UPnP.