The Federal Office for Information Security criticised Microsoft following the software giant's advice to adjust security settings to 'secure', claiming the browser would still not be completely safe.
"Using Internet Explorer in 'secure mode', as well as turning off Active Scripting makes attacks more difficult, but cannot fully prevent them."
Thomas Baumgaertner from Microsoft said the Google attacks were implemented by "highly motivated people with a very specific agenda" and "were not attacks against general users or consumers".
"There is no threat to the general user, consequently we do not support this warning."
Microsoft's next security update is due on February 9. However, the tech company revealed it is already working on a fix and could make it publicly available before the next scheduled security release.
Graham Cluley from security vendor Sophos said it was working with Microsoft "to see if the damage can be mitigated".
"One thing that should be stressed is that every browser has its security issues, so switching may remove this current risk but could expose you to another."
See also: Google hack attack code now public