They're citing the possibility of user data leaks to the Russian government.
After July 20, Kaspersky is prohibited from entering into any new agreements inside the U.S. under the new ban. Kaspersky can provide existing customers with cyber and antivirus software until Sept. 29, but after that "Kaspersky will not be able to provide security updates." Software services will "degrade," the rule says.
Raimondo said she wanted to make clear that Americans and U.S. businesses who continue to use existing Kaspersky products will not be breaking the law, but they will not be able to update their products as of Sept. 30. "I would encourage you in the strongest possible terms to immediately stop using that software and switch to an alternative in order to protect yourself, your data, and your family," the commerce secretary said.