How Safe Is the Wii Internet Channel? Not Safe

Unsafe. The Wii Internet Channel (Opera 9-based) has been unpatched since 2009 and Nintendo killed Wii online services in Jan 2019.

Risks

• TLS 1.0/1.1 only – modern sites require 1.2/1.3; handshake fails.
• No certificate transparency / HSTS / modern cipher suites – MITM trivial.
• JavaScript engine ancient – breaks 99% of sites; exploits unpatched (CVE-2009-xxxx etc.).
• No sandbox – exploit = full system access (ARM11 kernel).
• WiiConnect24 standby – background network access with zero auth.

What Still Works (Barely)

• Text-only sites (example.com, Wikipedia mobile? no).
• Homebrew: WiiMC (media), HTTP Wii (file transfer), RiiConnect24 (revived WiiConnect24 for FORECAST/NEWS/Everybody Votes).

Verdict

Do not browse the open web on Wii. Use a phone, PC, or Switch for internet. Keep Wii offline or on isolated VLAN if you run homebrew.