Microsoft Exchange ProjectInstance Deserialization of Untrusted Data Information Disclosure Vulnerability

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability. The specific flaw exists within the lack of protection against deserialization of the ProjectInstance class. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to disclose information in the context of SYSTEM.