I couldn't open the link from OP because it was blocked with a CF captcha, so I looked for another source of news and as far as I understand, this is not about hacking user wallets on this service, but about the fact that users are enabled to connect all their wallets to this service and use them as a
"crypto portfolio tracker".
As far as I understand, the danger is that hackers could take advantage of the fact that CS has allegedly published the list of affected coin addresses publicly (really smart

), and in combination with some other data, this could enable scammers to contact
"victims" and offer help.
It seems that the information from different articles is somewhat contradictory.
The portfolio manager states on its website that since it “asks for read-only access” to connected crypto wallets, users’ holdings remain “perfectly safe under any conditions.”
The platform offers users the ability to connect all their crypto wallets and use it as an overall crypto portfolio tracker, allowing them to view all their wallets in one place.