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Vulnerability record · CVE-2018-21121 · published 22 April 2020

CVE-2018-21121: Netgear gs810emx firmware improper authentication vulnerability

Netgear · Gs810emx Firmware

Certain NETGEAR devices are affected by authentication bypass. This affects GS810EMX before 1.0.0.5, XS512EM before 1.0.0.6, and XS724EM before 1.0.0.6.

8.8 CVSS 3.1 High EPSS 0.70% · top 47.8% CWE-287 · Improper authentication
8.8CVSS 3.1 base score, v2 5.8
0.70%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Certain NETGEAR devices are affected by authentication bypass. This affects GS810EMX before 1.0.0.5, XS512EM before 1.0.0.6, and XS724EM before 1.0.0.6.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://kb.netgear.com/000060237/Security-Advisory-for-Authentication-Bypass-on-Some-Switches-PSV-2018-0219 Vendor Advisory
https://kb.netgear.com/000060237/Security-Advisory-for-Authentication-Bypass-on-Some-Switches-PSV-2018-0219 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-21121), CISA KEV, FIRST EPSS (scores of 2026-10-15). This page is refreshed as NVD updates the record.