Software giant, Microsoft has issued a new warning regarding a venerability affecting all versions of its web browser, Internet Explorer.

The venerability, if exploited by could allow hackers to take control of an unprotected system. The code for exploiting the bug is already available on the web but the company said that there is no evidence that it is being used by major terrorists.

The company has created a protection on eh bug but it working on preparing a permanent fix for the issue. The venerability is related to the way that IE manages a computer's memory when it process processing Cascading Style Sheets, which is the technology determining look and feel of the website.

The company has been fighting hackers who exploit IE's memory management to inject their own malicious code and has released many updates that improve its memory management. However, these improvements do not work when some older parts of Windows are in use.

"We're currently unaware of any attacks trying to use the claimed vulnerability or of customer impact," said Dave Forstrom, the director of Microsoft's Trustworthy Computing group, in a statement.