diff --git a/onnxruntime/core/common/cpuid_info.cc b/onnxruntime/core/common/cpuid_info.cc
index afea9f62419fa..00711e416e4e3 100644
--- a/onnxruntime/core/common/cpuid_info.cc
+++ b/onnxruntime/core/common/cpuid_info.cc
@@ -366,7 +366,11 @@ CPUIDInfo::CPUIDInfo() {
 #endif  // defined(CPUINFO_SUPPORTED)
 
   // Note: This should be run after cpuinfo initialization if cpuinfo is enabled.
+  // On Wasm/Emscripten, cpuinfo cannot detect the CPU vendor so skip to avoid
+  // an unhelpful "Unknown CPU vendor" warning.
+#if !defined(__wasm__)
   VendorInfoInit();
+#endif
 
 #ifdef CPUIDINFO_ARCH_X86
   X86Init();
diff --git a/onnxruntime/core/common/cpuid_info.h b/onnxruntime/core/common/cpuid_info.h
index ca9315c7ef95d..be301019df5c0 100644
--- a/onnxruntime/core/common/cpuid_info.h
+++ b/onnxruntime/core/common/cpuid_info.h
@@ -168,7 +168,7 @@ class CPUIDInfo {
   bool has_arm_sme2_{false};
 
   std::string vendor_;
-  uint32_t vendor_id_;
+  uint32_t vendor_id_{0};
 };
 
 }  // namespace onnxruntime