A significant input validation flaw exists in the device's web management interface. While the front-end limits the length of WAN connection names, an attacker can use an HTTP proxy to bypass these restrictions. This allows for the tampering of parameter values, potentially leading to unauthorized configuration changes.
The most critical vulnerabilities associated with the ZTE F680 family generally fall into three categories: zte f680 exploit
Approximately 140,000+ devices globally are believed to be at risk. Status: A proof-of-concept exists in the public domain. Common Types of ZTE F680 Exploits A significant input validation flaw exists in the
Block inbound connections to ports 21 (FTP), 22 (SSH), 23 (Telnet), 80/443 (HTTP/S), and 7547 (TR-069) at the edge infrastructure level so they are not exposed to the public internet. Conclusion The most critical vulnerabilities associated with the ZTE
Deep Dive: Analyzing the ZTE F680 Exploits and Router Vulnerabilities
Researchers identified that the CGILua post.lua parser in many ZTE routers, including models similar to the F680, does not properly handle memory for application/x-www-form-urlencoded POST requests.
Once logged in as admin, an attacker can modify DNS settings (facilitating DNS hijacking), port forwarding rules, and Wi-Fi credentials. They effectively own the gateway.