Microsoft says Internet Explorer 5.01, 6 and 8 (beta) are also potentially susceptible to the zero-day exploit, published recently. Until now it had been assumed that only Internet Explorer 7 contained the vulnerability. However, no attacks on versions 6 and 8 have yet been observed. As a result of revising its security instructions for different versions, Microsoft has highlighted further measures users can take to defend their systems against attacks until a patch is provided.
Microsoft recommends that Data Execution Prevention (DEP) and memory protection be enabled in Internet Explorer 7 (Tools/Internet Options/Advanced/Enable memory protection…) more