CVE-2020-8438: Arris Ruckus Zoneflex r500 Firmware

High severity, CVSS 7.2. EPSS: 1.6% chance of exploitation in the next 30 days.

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.

Affected products

• Arris Ruckus Zoneflex r500 Firmware: version 104.0.0.0.1347 only

Published 2020-01-29. Last modified 2026-06-17.