Yahoo is down 0.4% at $45.47 a share on Thursday morning following a report out from CNET that suggests Yahoo is telling some of its users that hackers may have logged into their accounts, using a forged "cookie" which gives access even without a password.
That news follows a Bloomberg report out on Wednesday that said Yahoo and Verizon were close to agreeing on a deal that cut Yahoo's price by $250 million.
Back in July, Verizon agreed to pay $4.8 billion for Yahoo.
Then in December, Bloomberg reported that Verizon was considering killing the deal because Yahoo announced 1 billion user accounts were compromised.
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