The Commission arrived at the same conclusion in its final audit published late on Friday, which is an update of an earlier version made public in 2019.
He said he had also spoken about the issue with German officials, including Chancellor Angela Merkel, who he said wanted Russian or Chinese vaccines to be given European approval.
Hungary so far is the only EU member to have given emergency use approval to Chinese and Russian vaccines.
The country of 10.7 million has shown one of Europe's fastest per-capita rises in coronavirus infection since September although the incidence has slowed in the last few weeks.