No, do not use illegal download sites.

You can buy or rent the digital version here, which usually includes the Hindi dubbing as an audio option. Movie Details at a Glance Director: Guy Ritchie

Searching for a "deep report" on a Hindi-dubbed version of The Man from U.N.C.L.E. (2015)

Warner Bros. content frequently moves between JioCinema and Prime Video. Check the JioCinema app, as they often host older Hollywood titles with multiple language options, including Hindi and Tamil.

Some popular and safe options for downloading or streaming "The Man from U.N.C.L.E." in Hindi dubbed include: