diff --git a/onnxruntime/core/providers/migraphx/migraphx_execution_provider_utils.h b/onnxruntime/core/providers/migraphx/migraphx_execution_provider_utils.h
index cce90f3ef82be..e20cc9140916a 100644
--- a/onnxruntime/core/providers/migraphx/migraphx_execution_provider_utils.h
+++ b/onnxruntime/core/providers/migraphx/migraphx_execution_provider_utils.h
@@ -268,7 +268,7 @@ inline std::string GenerateGraphId(const GraphViewer& graph_viewer) {
   const fs::path path{main_graph.ModelPath()};
 
   if (path.has_filename()) {
-    const auto model_name = path.filename().string();
+    const auto model_name = PathToUTF8String(path.filename().native());
 
     LOGS_DEFAULT(INFO) << "Model name is '" << model_name << "'";
     // Ensure enough characters are hashed in case model names are too short
diff --git a/onnxruntime/core/providers/nv_tensorrt_rtx/onnx_ctx_model_helper.cc b/onnxruntime/core/providers/nv_tensorrt_rtx/onnx_ctx_model_helper.cc
index 7baac6aa1f6d0..0b137c4674b00 100644
--- a/onnxruntime/core/providers/nv_tensorrt_rtx/onnx_ctx_model_helper.cc
+++ b/onnxruntime/core/providers/nv_tensorrt_rtx/onnx_ctx_model_helper.cc
@@ -166,7 +166,7 @@ Status CreateCtxNode(const GraphViewer& graph_viewer,
     }
     attr_ep_cache_context->set_s(engine_data_str);
   } else {
-    std::string engine_cache_filename = std::filesystem::path(engine_cache_path).filename().string();
+    std::string engine_cache_filename = PathToUTF8String(std::filesystem::path(engine_cache_path).filename().native());
     attr_ep_cache_context->set_s(engine_cache_filename);
     std::fstream engine_cache_file(engine_cache_path, std::ios::binary | std::ios::out);
     if (engine_cache_file.is_open()) {
@@ -188,7 +188,7 @@ Status CreateCtxNode(const GraphViewer& graph_viewer,
 
   attr_onnx_filename->set_name(ONNX_MODEL_FILENAME);
   attr_onnx_filename->set_type(onnx::AttributeProto_AttributeType_STRING);
-  attr_onnx_filename->set_s(std::filesystem::path(onnx_model_path).filename().string());
+  attr_onnx_filename->set_s(PathToUTF8String(std::filesystem::path(onnx_model_path).filename().native()));
 
   attr_sdk_version->set_name(SDK_VERSION);
   attr_sdk_version->set_type(onnx::AttributeProto_AttributeType_STRING);
diff --git a/onnxruntime/core/providers/openvino/backend_manager.cc b/onnxruntime/core/providers/openvino/backend_manager.cc
index 892bdec7abe83..c033b0b10a786 100644
--- a/onnxruntime/core/providers/openvino/backend_manager.cc
+++ b/onnxruntime/core/providers/openvino/backend_manager.cc
@@ -185,7 +185,7 @@ void BackendManager::TryExportCompiledBlobAsEPCtxNode(const onnxruntime::GraphVi
       model_blob_str = std::move(ss).str();
     }
   } else {  // External blob
-    model_blob_str = shared_context_.GetBinPath().filename().string();
+    model_blob_str = PathToUTF8String(shared_context_.GetBinPath().filename().native());
   }
 
   auto status = ep_ctx_handle_.AddOVEPCtxNodeToGraph(graph_body_viewer,
diff --git a/onnxruntime/core/providers/qnn/builder/onnx_ctx_model_helper.cc b/onnxruntime/core/providers/qnn/builder/onnx_ctx_model_helper.cc
index 0e49c0f897bea..68aa9a157f4a2 100644
--- a/onnxruntime/core/providers/qnn/builder/onnx_ctx_model_helper.cc
+++ b/onnxruntime/core/providers/qnn/builder/onnx_ctx_model_helper.cc
@@ -269,7 +269,7 @@ Status CreateEPContextNodes(Model* model,
         }
 
         context_bin_path = context_bin_path + ToPathString("_qnn.bin");
-        context_cache_name = std::filesystem::path(context_bin_path).filename().string();
+        context_cache_name = PathToUTF8String(std::filesystem::path(context_bin_path).filename().native());
 
         // If generate ctx.onnx with share_ep_context enabled, all ctx.onnx should point to the same ctx.bin
         if (share_ep_contexts) {
diff --git a/onnxruntime/core/providers/qnn/builder/qnn_profile_serializer.cc b/onnxruntime/core/providers/qnn/builder/qnn_profile_serializer.cc
index fb76f2110cbc8..87340e5b3ebeb 100644
--- a/onnxruntime/core/providers/qnn/builder/qnn_profile_serializer.cc
+++ b/onnxruntime/core/providers/qnn/builder/qnn_profile_serializer.cc
@@ -237,7 +237,7 @@ Serializer::Serializer(const ProfilingInfo& profiling_info,
       tracelogging_provider_ep_enabled_(tracelogging_provider_ep_enabled) {
 #ifdef QNN_SYSTEM_PROFILE_API_ENABLED
   std::filesystem::path output_fs_filepath(profiling_info.csv_output_filepath);
-  qnn_log_filename_ = output_fs_filepath.filename().string();
+  qnn_log_filename_ = PathToUTF8String(output_fs_filepath.filename().native());
   // Remove extension (assumed to be ".csv") then add "_qnn.log"
   size_t extension_start_idx = qnn_log_filename_.rfind(".");
   qnn_log_filename_ = qnn_log_filename_.substr(0, extension_start_idx);
diff --git a/onnxruntime/core/providers/tensorrt/onnx_ctx_model_helper.cc b/onnxruntime/core/providers/tensorrt/onnx_ctx_model_helper.cc
index 2a54bfea86e91..091b110d8c746 100644
--- a/onnxruntime/core/providers/tensorrt/onnx_ctx_model_helper.cc
+++ b/onnxruntime/core/providers/tensorrt/onnx_ctx_model_helper.cc
@@ -120,7 +120,7 @@ ONNX_NAMESPACE::ModelProto* CreateCtxModel(const GraphViewer& graph_viewer,
   attr_2->set_s(compute_capability);
   attr_3->set_name(ONNX_MODEL_FILENAME);
   attr_3->set_type(onnx::AttributeProto_AttributeType_STRING);
-  attr_3->set_s(std::filesystem::path(onnx_model_path).filename().string());
+  attr_3->set_s(PathToUTF8String(std::filesystem::path(onnx_model_path).filename().native()));
   attr_4->set_name(SOURCE);
   attr_4->set_type(onnx::AttributeProto_AttributeType_STRING);
   attr_4->set_s(kTensorrtExecutionProvider);
diff --git a/onnxruntime/core/session/environment.cc b/onnxruntime/core/session/environment.cc
index 7cd02e5413407..f37c685cf2f28 100644
--- a/onnxruntime/core/session/environment.cc
+++ b/onnxruntime/core/session/environment.cc
@@ -618,7 +618,7 @@ Status Environment::CreateAndRegisterInternalEps() {
 Status Environment::RegisterExecutionProviderLibrary(const std::string& registration_name, const ORTCHAR_T* lib_path) {
   std::lock_guard<std::mutex> lock{mutex_};
 
-  std::string lib_file_name = std::filesystem::path(lib_path).filename().string();
+  std::string lib_file_name = PathToUTF8String(std::filesystem::path(lib_path).filename().native());
   Env::Default().GetTelemetryProvider().LogRegisterEpLibraryWithLibPath(registration_name, lib_file_name);
 
   std::vector<EpFactoryInternal*> internal_factories = {};
diff --git a/onnxruntime/core/session/inference_session.cc b/onnxruntime/core/session/inference_session.cc
index 08b58f3de1a11..b873c95b496bb 100644
--- a/onnxruntime/core/session/inference_session.cc
+++ b/onnxruntime/core/session/inference_session.cc
@@ -2612,7 +2612,7 @@ common::Status InferenceSession::Initialize() {
 
     // and log telemetry
     std::filesystem::path model_path = graph.ModelPath();
-    std::string model_file_name = model_path.filename().string();
+    std::string model_file_name = PathToUTF8String(model_path.filename().native());
     bool model_has_fp16_inputs = ModelHasFP16Inputs(graph);
     env.GetTelemetryProvider().LogSessionCreation(
         session_id_, model_->IrVersion(), model_->ProducerName(), model_->ProducerVersion(), model_->Domain(),
@@ -4096,7 +4096,7 @@ void InferenceSession::LogAllSessions() {
     if (nullptr != model) {
       onnxruntime::Graph& graph = model->MainGraph();
       std::filesystem::path model_path = graph.ModelPath();
-      std::string model_file_name = model_path.filename().string();
+      std::string model_file_name = PathToUTF8String(model_path.filename().native());
       bool model_has_fp16_inputs = ModelHasFP16Inputs(graph);
       std::string model_weight_type = session->GetWeightDataType();
       std::string model_graph_hash = session->GetGraphHash();