Microsoft is a company that usually keeps plenty busy advising users of security issues with its products. Redmond is now advising users about a blended security threat that involves users running Apple's Safari Web browser on Windows.

The threat could potentially allow Safari to download a malicious file that Windows would then execute. Microsoft has a work-around it suggests, though no patch is available from Apple (NASDAQ: AAPL) for the issue.

"Security Advisory (953818) does not refer to vulnerability in either Safari or Windows," Tim Rains, security response communications lead for Microsoft said in a statement sent to InternetNews.com.

The Safari issue had been publicly disclosed by security researcher Nitesh Dhanajani on May 15. Dhanajani described the issue as a 'Safari Carpet Bomb' in his discussion of the security risk.