Security researchers have discovered a serious boundary error vulnerability in multiple versions of Microsoft's Windows platform and warned that attackers could hijack systems via Windows Explorer and Internet Explorer (IE). Rodrigo Gutierrez, a researcher with Trustix AS, notified Microsoft of the flaw with a warning that it could be exploited by malicious attackers to cause a buffer overflow and lead to system takeover. The vulnerability is caused due to a boundary error, which can be triggered via Internet Explorer and Windows Explorer when connecting to a file server. This can be exploited to cause a buffer overflow by setting up a malicious share with an overly long name (about 300 bytes) containing no lower case characters. Secunia rates the flaw as "highly critical" and urged Windows XP and Windows 2000 users to restrict traffic in border routers and firewalls as a temporary workaround. Users could also disable the "Client for Microsoft Networks" for network cards to impact file sharing functionality.