https://support.microsoft.com/en-us/topic/kb2543893-ms11-049-vulnerability-in-the-microsoft-xml-editor-could-allow-information-disclosure-june-14-2011-99e56764-4114-dedb-9185-e5f71e97e975
KB2543893 - MS11-049: Vulnerability in the Microsoft XML Editor could allow information disclosure:...
Resolves a vulnerability in Microsoft XML Editor that could allow information disclosure if a user opened a specially crafted Web Service Discovery (.disco)...