Internet Explorer’s legacy WebBrowser control can be abused to turn seemingly harmless user clicks into full remote code execution (RCE), even on systems that no longer use Internet Explorer as a standalone browser.
Although Microsoft officially ended support for IE, the Trident engine and WebBrowser ActiveX control remain embedded in numerous Windows applications built with Visual Basic, .NET, and C, providing attackers with a surprisingly powerful attack surface for converting basic user interaction into code execution.
Internet Explorer WebBrowser Control Abuse
Despite IE’s deprecation, the WebBrowser control is still treated as a first-class citizen in Windows’ security zone model, inheriting elevated permissions when hosted under special origins such as
http://localhost or file: URLs.
In practice, this means that desktop applications exposing embedded browsers on localhost, email clients, Electron-based software, dev stacks like XAMPP, or bundled web consoles, may silently inherit IE’s quirks and high-privilege behaviors without any explicit opt-in from developers. Attackers can chain these behaviors to pivot from a benign-looking website to local file execution paths.
gbhackers.com
