Aug 10 (Reuters) - Tata Consultancy Services has received alerts alleging the ‌possible exposure of certain employee-related ‌data, India's largest IT firm said on ​Monday, adding that there was no indication that customer data or systems have been impacted. The information referenced ‌in the alerts ⁠appears to be over-four-year old and limited to basic ⁠employee information, TCS said in a statement, without offering further details ​including who ​has issued ​the alerts and ‌when. TCS said it has had safeguards in place for over two years against the manner in which this attack was carried out. "Based on the current ‌review, these controls remain ​effective, ​and the Company continues to monitor the environment closely," it said. (Reporting ​by ‌Kashish Tandon and Haripriya Suresh in ​Bengaluru; Editing by Janane Venkatraman ​and Mrigank Dhaniwala)