openwrt-dev

No clear evidence of stealthy malware (e.g., backdoor, exfiltration, reverse shell) is present in the provided fragment. The primary security concern is sabotage/availability risk: the script fetches an external blacklist and directly converts its contents into DROP firewall rules after deleting existing rules and reloading fw4. If the remote URL/content is compromised, altered, or malformed, the device firewall state can be disrupted (including removal of legitimate rules) leading to denial of service or unintended blocking. Separately, plaintext WiFi keys in configuration create credential-handling/supply-chain exposure risk if real secrets are shared.