The ES File Explorer File Manager application through 4.1.9.7.4 for Android allows remote attackers to read arbitrary files or execute applications via TCP port 59777 requests on the local Wi-Fi network. This TCP port remains open after the ES application has been launched once, and responds to unauthenticated application/json data over HTTP.

The master-password feature in the ES File Explorer File Manager application 4.2.0.1.3 for Android can be bypassed via a com.estrongs.android.pop.ftp.ESFtpShortcut intent, leading to remote FTP access to the entirety of local storage.

The Help feature in the ES File Explorer File Manager application 4.1.9.7.4 for Android allows session hijacking by a Man-in-the-middle attacker on the local network because HTTPS is not used, and an attacker's web site is displayed in a WebView with no information about the URL.