Microsoft has announced a security flaw with all current versions of Internet Explorer and are actively working on a patch to address the issue.

ITServices is monitoring the situation and have not received any reports of compromised systems on campus. Users accessing Queen’s websites may continue to use Internet Explorer, but when surfing the web, we recommend the use of an alternative, second, web browser until a corrective patch has been released.

Additional information concerning the vulnerability can be found here.
https://technet.microsoft.com/en-US/library/security/2963983