.NET SOAPwn Flaw Opens Door for File Writes and Remote Code Execution via Rogue WSDL
Dec 10, 2025
Enterprise Security / Web Services
New research has uncovered exploitation primitives in the .NET Framework that could be leveraged against enterprise-grade applications to achieve remote code execution. WatchTowr Labs, which has codenamed the "invalid cast vulnerability" SOAPwn , said the issue impacts Barracuda Service Center RMM, Ivanti Endpoint Manager (EPM), and Umbraco 8. But the number of affected vendors is likely to be longer given the widespread use of .NET. The findings were presented today by watchTowr security researcher Piotr Bazydlo at the Black Hat Europe security conference, which is being held in London. SOAPwn essentially allows attackers to abuse Web Services Description Language (WSDL) imports and HTTP client proxies to execute arbitrary code in products built on the foundations of .NET due to errors in the way they handle Simple Object Access Protocol ( SOAP ) messages. "It is usually abusable through SOAP clients, especially if they are dynamically created from the attacker-c...
