diff --git a/remoting/host/clipboard_win.cc b/remoting/host/clipboard_win.cc
index 50665c3352c7e..b29dee564fcba 100644
--- a/remoting/host/clipboard_win.cc
+++ b/remoting/host/clipboard_win.cc
@@ -231,7 +231,11 @@ void ClipboardWin::OnClipboardUpdate() {
         LOG(WARNING) << "Couldn't lock clipboard data: " << GetLastError();
         return;
       }
-      text.assign(text_lock.data());
+      // CF_UNICODETEXT placed by other processes is not guaranteed to be
+      // NUL-terminated; bound the read by the HGLOBAL size and then trim at
+      // the first embedded NUL (matches ui/base/clipboard/clipboard_win.cc).
+      const size_t max_chars = text_lock.size() / sizeof(WCHAR);
+      text.assign(text_lock.data(), wcsnlen(text_lock.data(), max_chars));
     }
 
     protocol::ClipboardEvent event;