Affected: zte zxhn_z500_firmware, zte zxhn_e500_firmware, zte zxhn_h108n_firmware, zte zxhn_e2615_firmware, zte zxhn_e2603_firmware, zte zxhn_e2618_firmware, zte zxhn_e1600_firmware, zte zxhn_h338a_firmware, zte zxhn_h168n_firmware, zte zxhn_h168a_firmware

The HTTPD binary in multiple ZTE routers has a stack-based buffer overflow vulnerability in check_data_integrity function. This function is responsible for validating the checksum of data in post request. The checksum is sent encrypted in the request, the function decrypts it and stores the checksum on the stack without validating it. An unauthenticated attacker can get RCE as root by exploiting this vulnerability.