Microsoft Windows Support Diagnostic Tool (MSDT) is affected by a remote code execution vulnerability when MSDT is called using the URL protocol from a calling application such as Word. An attacker who successfully exploits this vulnerability can run arbitrary code with the privileges of the calling application. The attacker can then install programs, view, change, or delete data, or create new accounts in the context allowed by the user’s rights.

Note that Nessus has not tested for this issue but has instead only checked for the presence of a workaround.Read More