diff --git a/MdePkg/Library/UefiDevicePathLib/DevicePathUtilities.c b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilities.c
index 5d7635fe3e..dd1bddc1c2 100644
--- a/MdePkg/Library/UefiDevicePathLib/DevicePathUtilities.c
+++ b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilities.c
@@ -95,6 +95,15 @@ IsDevicePathValid (
         return FALSE;
       }
     }
+
+    //
+    // FilePath must be a NULL-terminated string.
+    //
+    if (DevicePathType (DevicePath) == MEDIA_DEVICE_PATH &&
+        DevicePathSubType (DevicePath) == MEDIA_FILEPATH_DP &&
+        *(CHAR16 *)((UINT8 *)DevicePath + NodeLength - 2) != 0) {
+      return FALSE;
+    }
   }
 
   //