Why has the Heartbleed threat window been left wide open?

The Heartbleed bug is yesterday's news and no longer something we need to worry about, right? Wrong. The problem is too many people think this way, which has led to the situation where many enterprises still have machines that are unprotected from the flaw. Security outfit Venafi probed the Forbes Global 2000 list of companies 10 days ago and discovered more than half - across banking, health and retail sectors - still had devices that were vulnerable. In fact, 1,219 out of the 2,000 companies, and 448,000 potentially vulnerable servers, were detected.