Software giant Microsoft has announced that it would release twelve security bulletins on Tuesday to fix as many as twenty-two vulnerabilities.

These security bulletins will fix vulnerabilities in Internet Explorer (IE), Windows and the Visio diagramming software.

Of the total twelve bulletins, three including the IE patch, have been called "Critical", while the remaining nine have been mentioned as "Important".

The IE CSS bug, which affected many of the available versions of IE, was first discovered in December last year. This bug allows hackers to trap a victim with a booby-trapped webpage, and stick a malware or steal personal information.

Qualys, a net security services firm, said that none of the announced bulletins will fix the recently discovered MHTML hole in Windows/IE.

Speaking on the topic, the company said, "Microsoft is aware of published information and proof-of-concept code that attempts to exploit this vulnerability. At this time, Microsoft has not seen any indications of active exploitation of the vulnerability."

Zero-day flaws which created vulnerabilities in the FTP service found in the IIS 7.0 and 7.5 will also be addressed.