The root-privileged `wsserver` terminal-bridge daemon builds a shell command from client-supplied WebSocket fields and passes it to `system()` and `popen()` without quoting, escaping, or character-set validation. The daemon's public-key session path performs no appliance-session check.
https://www.runzero.com/blog/lights-out-exposed/
https://www.runzero.com/advisories/avocent-acs8000-wsserver-cmdinj-cve-2026-65184