Can someone hack my Cash App with just my Cashtag? What is a Cashtag number No, it’s not possible to hack the account with just having cashtag or username of the cash app account. The hackers won’t be able to hack your account until they have other details of the account. But, there are lesser chances of hacking on cash app and they take care of security. https://www.experts-support.com/blog/what-is-a-cashtag-number