Police and paramedics found the victim on Chester Road, near Seven Kings High Road, Redbridge, at 9.53pm on Monday.
He was found with a stab wound, and taken to an east London hospital where his condition is “not life threatening”.
A knife was found nearby after being traced by a police blood dog.
Chester Road was closed by officers last night, according to pictures from Instagram account ig1_ig2.
There have been no arrests so far.
Anyone who witnessed this incident or has information or dash-cam footage should call police on 101 quoting 7913/25JUL.
To remain 100% anonymous call the independent charity Crimestoppers on 0800 555 111 or visit Crimestoppers-uk.org.