CVE-2018-5330: Zyxel P-660hw v3 Firmware

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

ZyXEL P-660HW v3 devices allow remote attackers to cause a denial of service (router unreachable/unresponsive) via a flood of fragmented UDP packets.

Affected products

• Zyxel P-660hw v3 Firmware: affected versions not specified

Published 2018-01-16. Last modified 2026-06-17.