CVE-2026-72840 OpenWrt LuCI luci-mod-system-mounts ACL Root RCE via Crontab Write

OpenWrt LuCI contains an overly permissive ACL definition in luci-mod-system-mounts that grants write access to /etc/crontabs/root to users intended only for mount configuration. Authenticated users with only the mount-configuration ACL group can append arbitrary cron entries via ubus file.write,...