What is CVE-2018-5330?

CVE-2018-5330 is a high-severity vulnerability in Zyxel P-660hw V3. CVSS score: 7.5/10. Published 2018-01-16.

How severe is CVE-2018-5330?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Zyxel P-660hw V3

CVE-2018-5330

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

Published 2018-01-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

References

packetstormsecurity.com/files/145863/ZyXEL-P-660HW-UDP-Denial-Of-Service.html (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2018-5330?: CVE-2018-5330 is a high-severity vulnerability in Zyxel P-660hw V3. CVSS score: 7.5/10. Published 2018-01-16.
How severe is CVE-2018-5330?: High severity. CVSS v3 base score is 7.5 out of 10.