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 webPrivateDecrypt function. This function is responsible for decrypting RSA encrypted ciphertext, the encrypted data is supplied base64 encoded. The decoded ciphertext is stored on the stack without checking its length. An unauthenticated attacker can get RCE as root by exploiting this vulnerability.