Yahoo has said that hackers used forged cookies to gain unauthorised access to the email accounts of its users between 2015 and 2016, it has been reported.
In warning emails that the company is currently sending out to its clients whom it believes must have fallen victim to the yet another hacking incident, the company says that hackers must have accessed its proprietary code and then used the code to develop forged cookies. The fake cookies are believed to have given the hackers access to the accounts of many users of Yahoo.
‘From the findings of the investigations that we are conducting, we believe that a forged cookie may have been between 2015 and 2016 to access your account,’ the company says in the emails that it is sending to a number of its customers.
The recent revelations come at a time when Yahoo is embroiled in a crisis following two hacking incidents that the company suffered about six months ago.
Towards the end of 2015, it was revealed that the company suffered a massive hacking attack with the accounts of more than 1 billion customers having been compromised.
At the time, the company blamed the hacking on a fake cookie that it said hackers managed to develop after accessing its proprietary code.
There was public uproar following the incident, given that Yahoo could not explain how hackers had managed to access its proprietary code.
Earlier in September 2015, the company announced that hackers had breached its systems, managing to access the accounts of about 500 million customers. The company said that the hackers stole the personal information of its clients.
But what raised more eyebrows were the revelations that the top executives of the company had been informed of the breach earlier but failed to disclose the information to the persons concerned within a reasonable time.
Interestingly, the recent revelations of another possible hack are likely to jeopardise the takeover bid of the company by Verizon. Following the news that Yahoo had suffered a major hacking incident back in December 2016, Verizon announced that it was considering renegotiating the deal with Yahoo.
It has been reported that following the recent revelations of another possible hack at Yahoo, Verizon is keen on negotiating for an even lower price for the takeover. It remains to be seen how the recent developments will affect Yahoo.