diff --git a/pymodbus/pdu/device.py b/pymodbus/pdu/device.py
index 4ecdf5ca4..cfd231c33 100644
--- a/pymodbus/pdu/device.py
+++ b/pymodbus/pdu/device.py
@@ -205,7 +205,7 @@ def __getitem__(self, key):
 
         :param key: The register to read
         """
-        return self.stat_data.setdefault(key, "")
+        return self.stat_data.get(key, "")
 
     def __str__(self):
         """Build a representation of the device.
diff --git a/pymodbus/pdu/mei_message.py b/pymodbus/pdu/mei_message.py
index 34bdef7c5..0d3a03422 100644
--- a/pymodbus/pdu/mei_message.py
+++ b/pymodbus/pdu/mei_message.py
@@ -101,6 +101,10 @@ async def datastore_update(
             return ExceptionResponse(self.function_code, ExcCodes.ILLEGAL_VALUE)
 
         information = DeviceInformationFactory.get(_MCB, self.read_code, self.object_id)
+        if self.read_code == DeviceInformation.SPECIFIC and (
+            0x07 <= self.object_id < 0x80 or not information.get(self.object_id)
+        ):
+            return ExceptionResponse(self.function_code, ExcCodes.ILLEGAL_ADDRESS)
         return ReadDeviceInformationResponse(
             read_code=self.read_code,
             information=information,
diff --git a/test/pdu/test_device.py b/test/pdu/test_device.py
index dc80e6019..d73df32d3 100644
--- a/test/pdu/test_device.py
+++ b/test/pdu/test_device.py
@@ -171,6 +171,7 @@ def test_modbus_device_identification_get(self):
         assert self.ident[0x08] != "x"
         assert self.ident[0x10] != "reserved"
         assert not self.ident[0x54]
+        assert 0x54 not in dict(self.ident)
 
     def test_modbus_device_identification_summary(self):
         """Test device identification summary creation."""
diff --git a/test/pdu/test_mei_messages.py b/test/pdu/test_mei_messages.py
index 7788f8105..09885adf7 100644
--- a/test/pdu/test_mei_messages.py
+++ b/test/pdu/test_mei_messages.py
@@ -80,6 +80,14 @@ async def test_read_device_information_request(self, mock_server_context):
         with pytest.raises(KeyError):
             _ = result.information[0x81]
 
+        handle = ReadDeviceInformationRequest(
+            read_code=DeviceInformation.SPECIFIC, object_id=0x00
+        )
+        result = await handle.datastore_update(context, 0)
+        assert cast(ReadDeviceInformationResponse, result).information == {
+            0x00: "Company"
+        }
+
         handle = ReadDeviceInformationRequest(
             read_code=DeviceInformation.EXTENDED, object_id=0x80
         )
@@ -101,6 +109,17 @@ async def test_read_device_information_request_error(self, mock_server_context):
         assert (await handle.datastore_update(context, 0)).function_code == 0xAB
         handle.object_id = 0x100
         assert (await handle.datastore_update(context, 0)).function_code == 0xAB
+        handle = ReadDeviceInformationRequest(
+            read_code=DeviceInformation.SPECIFIC, object_id=0x54
+        )
+        result = await handle.datastore_update(context, 0)
+        assert result.exception_code == ExcCodes.ILLEGAL_ADDRESS
+        ModbusControlBlock().Identity[0xFE] = ""
+        handle = ReadDeviceInformationRequest(
+            read_code=DeviceInformation.SPECIFIC, object_id=0xFE
+        )
+        result = await handle.datastore_update(context, 0)
+        assert result.exception_code == ExcCodes.ILLEGAL_ADDRESS
 
     def test_read_device_information_calc1(self):
         """Test calculateRtuFrameSize, short buffer."""