When installing the Net2 software a root certificate is installed into the trusted store. A potential hacker could access the installer batch file or reverse engineer the source code to gain access to the root certificate password. Using the root certificate and password they could then create their own certificates to emulate another site. Then by establishing a proxy service to emulate the site they could monitor traffic passed between the end user and the site allowing access to the data content.

In certain devices of the Phoenix Contact AXL F BK and IL BK product families an undocumented password protected FTP access to the root directory exists.

An issue was discovered in the net2 crate before 0.2.36 for Rust. It has false expectations about the std::net::SocketAddr memory representation.

Multiple directory traversal vulnerabilities in the (a) "Unzip archive" and (b) "Upload files and archives" functionality in net2ftp 0.96 stable and 0.97 beta allow remote attackers to create, read, or delete arbitrary files via a .. (dot dot) in a filename within a (1) TAR or (2) ZIP archive. NOTE: this can be leveraged for code execution by creating a .php file.

Cross-site scripting (XSS) vulnerability in index.php in net2ftp 0.93 allows remote attackers to inject arbitrary web script or HTML via the username parameter. NOTE: some of these details are obtained from third party information.

PHP remote file inclusion vulnerability in index.php in net2ftp, possibly 0.1 through 0.62, allows remote attackers to execute arbitrary PHP code via a URL in the application_rootdir parameter. NOTE: this issue has been disputed by a third party researcher, CVE, and the vendor. The vendor says "the variable is set in settings.inc.php, so this is not a vulnerability.

An unspecified Fortinet product, possibly Fortinet28, allows remote attackers to cause a denial of service via a "small synflood" to the SMTP port (TCP port 25), as demonstrated by a 10-microsecond wait between sending packets. NOTE: this issue has been disputed in followup posts that suggest that a protection feature is triggering a RST.