CVE-2016-3255

CVE-2016-3255 is an XML External Entity (XXE) vulnerability affecting multiple versions of Microsoft .NET Framework, including 2.0 SP2, 3.5, 3.5.1, 4.5.2, 4.6, and 4.6.1. This flaw allows remote attackers to achieve information disclosure by reading arbitrary files through specially crafted XML data containing external entity declarations. The vulnerability has a CVSS v3 score of 7.5 (High), indicating a critical risk due to its network attack vector, low attack complexity, and high impact on confidentiality. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code in Metasploit or ExploitDB, or significant community discussion or media coverage.