Ruckus ZoneFlex R500 104.0.0.0.1347 devices allow an authenticated attacker to execute arbitrary OS commands via the hidden /forms/nslookupHandler form, as demonstrated by the nslookuptarget=|cat${IFS} substring.
https://sku11army.blogspot.com/2020/01/ruckus-rce-ruckus-m500-via-injection-on.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8438