\addchap{Abstract}\label{ch:abstract} As semiconductor node sizes shrink, transient hardware faults pose a growing risk to computing systems, especially in environments where reliability is critical. WebAssembly (Wasm), a binary code format developed for the web, is increasingly used in embedded systems through standalone runtimes such as the WebAssembly Micro Runtime (WAMR)~\autocite{wamr}. This thesis investigates WAMR's compatibility with hardening techniques for transient hardware faults through systematic single-bit fault injection on a simulated IA-32 CPU using the Fault Injection Leveraged (FAIL*) fault-injection framework. The interpreter and ahead-of-time compiled execution modes of WAMR are compared under fault conditions and software-based hardening techniques are evaluated at two levels: (I) the language/application level, by hardening source programs before compilation to Wasm, and (II) the runtime level, by hardening WAMR itself. \todo[inline]{Abstract from expose, needs to be rewritten} \todo[inline]{Already link to glossary here? Already cite here?}