backupsettings.html in the web administrative portal in Zhone zNID GPON 2426A before S3.0.501 places a session key in a URL, which allows remote attackers to obtain arbitrary user passwords via the sessionKey parameter in a getConfig action to backupsettings.conf.

The web administrative portal in Zhone zNID GPON 2426A before S3.0.501 allows remote attackers to execute arbitrary commands via shell metacharacters in the ipAddr parameter to zhnping.cmd.

Multiple Cross-Site Scripting (XSS) issues in the web interface on DASAN Zhone ZNID GPON 2426A EU version S3.1.285 devices allow a remote attacker to execute arbitrary JavaScript via manipulation of an unsanitized GET parameter: /zhndnsdisplay.cmd (name), /wlsecrefresh.wl (wlWscCfgMethod, wl_wsc_reg).

The web administrative portal in Zhone zNID 2426A before S3.0.501 allows remote authenticated users to bypass intended access restrictions via a modified server response, related to an insecure direct object reference.