Now-a-days Talk Talk is investigating a “significant and sustained cyber-attack” on their website to facilitate their customers. The attack was DDoS (distributed denial of service). Unluckily, many hackers tried their vulnerable attacks to hack their website and user information. But analyzing as a whole it had been directed to website not the core system. There is up to 40 million customers using Talk Talk and could be at risk. BAE systems are supporting this platform against cyber-attacks. Many customers took to social media to complain about their treatment following the attack, Talk Talk’s third data breach this year, with media also reporting some had been told they faced hundreds of pounds in fees to leave the provider. Now companies are hiring ISO (Information Security Officer) in upcoming month to improve the level of security and to become a vital for the public companies in future.