An “invalid command” handler issue was discovered in HiNet GPON firmware < I040GWR190731. It allows an attacker to execute arbitrary command through port 3097. CVSS 3.0 Base score 10.0. CVSS vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).