What is CVE-2018-21125?

CVE-2018-21125 is a high-severity vulnerability in NETGEAR Wac510, classified under Improper Authentication. CVSS score: 8.8/10. Published 2020-04-22.

How severe is CVE-2018-21125?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in NETGEAR Wac510

CVE-2018-21125

NETGEAR WAC510 devices before 5.0.0.17 are affected by authentication bypass.

Vulnerability class: Broken Authentication

Published 2020-04-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

kb.netgear.com/000060233/Security-Advisory-for-an-Authentication-Bypass-on-WAC5… (Vendor Advisory)

Frequently asked questions

What is CVE-2018-21125?: CVE-2018-21125 is a high-severity vulnerability in NETGEAR Wac510, classified under Improper Authentication. CVSS score: 8.8/10. Published 2020-04-22.
How severe is CVE-2018-21125?: High severity. CVSS v3 base score is 8.8 out of 10.