According to security advisories, a vulnerability in Ask.com's toolbar for Internet Explorer could allow an attacker to take control of a user’s PC.
The problem concerns a buffer overflow flaw in the toolbar and involves an ActiveX control, according to an advisory posted by security vendor Secunia APS, which rated the problem as "highly critical," its second most severe rating. It affects version 4.0.2 of the toolbar and possibly others.
Critical Vulnerability Found in Ask.com Toolbar 
Linear Mode
