Not much change from the 2016, report. With employee/employer contributions, plus interest paid by the federal government for borrowing surplus funds, SSA can meet all obligations thru 2021. After that, the Treasury bonds issued for borrowing the previous surpluses must be cashed in. To do that, congress must increase revenue (taxes), cut expenses, borrow more to replace the cashed in Treasuries, or a combination of the three methods. That will fully fund payments to annuitants until 2034. After that, payments will be reduced by 25 percent.
https://www.ssa.gov/oact/trsum/?ftag=MSFd61514f
Yes, reform is required, if obligations are to be met.