What is CVE-2018-21137?

CVE-2018-21137 is a critical-severity vulnerability in NETGEAR D3600, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2020-04-23.

How severe is CVE-2018-21137?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in NETGEAR D3600

CVE-2018-21137

Certain NETGEAR devices are affected by a hardcoded password. This affects D3600 before 1.0.0.76 and D6000 before 1.0.0.76.

Published 2020-04-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (72.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 72.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

kb.netgear.com/000060223/Security-Advisory-for-Hardcoded-Password-on-Some-Modem… (Vendor Advisory)

Frequently asked questions

What is CVE-2018-21137?: CVE-2018-21137 is a critical-severity vulnerability in NETGEAR D3600, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2020-04-23.
How severe is CVE-2018-21137?: Critical severity. CVSS v3 base score is 9.8 out of 10.