diff --git sandbox/policy/win/sandbox_win.cc sandbox/policy/win/sandbox_win.cc
index 617103850407d..633805d2f7e8d 100644
--- sandbox/policy/win/sandbox_win.cc
+++ sandbox/policy/win/sandbox_win.cc
@@ -933,6 +933,17 @@ ResultCode SandboxWin::StartSandboxedProcess(
     const base::HandlesToInheritVector& handles_to_inherit,
     SandboxDelegate* delegate,
     StartSandboxedProcessCallback result_callback) {
+  // Will be nullptr if SandboxInterfaceInfo was not initialized by the CEF
+  // client, meaning that the sandbox is implicitly disabled.
+  if (!g_broker_services) {
+    base::Process process;
+    ResultCode result =
+        LaunchWithoutSandbox(cmd_line, handles_to_inherit, delegate, &process);
+    DWORD last_error = GetLastError();
+    std::move(result_callback).Run(std::move(process), last_error, result);
+    return SBOX_ALL_OK;
+  }
+
   SandboxLaunchTimer timer;
 
   // Avoid making a policy if we won't use it.