The Telenav Scout GPS Link app 1.x for iOS, as used with Toyota and Lexus vehicles, has an incorrect protection mechanism against brute-force attacks on the authentication process, which makes it easier for attackers to obtain multimedia-screen access via port 7050 on the cellular network, as demonstrated by a DrivingRestriction method call to uma/jsonrpc/mobile.

The autonavi (aka com.telenav.doudouyou.android.autonavi) application 4.6.1 for Android does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.