Equifax Inc (NYSE:EFX) shares look set to lose more value on Thursday, with the stock down another 1.5% to US$97.45, after confirming late on Wednesday that the massive data breach was due to the exploitation of a known vulnerability in a website application.
It has already been suggested in the media that the problem could be related to the application, known as Apache Struts, though the credit reference company’s update also suggested that it is still in the dark about the precise extent of the breach.
READ: Equifax owns up to massive data breach - AFTER HOURS
Equifax told investors it “has been intensely investigating the scope of the intrusion”, which isn’t as reassuring as many investors may have hoped for.
The breach could have potentially exposed the data of some 143 mln Americans, according to reports.
In New York, Equifax has now lost nearly a third of its value, losing around US$42.36 per share or a total of US$5bn since last week.