A Captive Portal Custom Handler command injection vulnerability exists in Arista Edge Threat Management - Arista Next Generation Firewall (NGFW). On affected platforms, an administrative account logged into the user interface can exploit this input handling behavior to execute arbitrary platform shell commands.
A successful attack requires authenticated administrative interface access rights over the targeted NGFW UI deployment endpoint.
Per operational best practice security models, do not allow unauthorized administrative access to the administrative browser.
The recommended resolution is to upgrade to NGFW Version 17.4.1 at your earliest convenience.