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Vulnerability record · CVE-2018-21181 · published 28 April 2020

CVE-2018-21181: Netgear d7800 firmware out-of-bounds write vulnerability

Netgear · D7800 Firmware

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects D7800 before 1.0.1.28, EX2700 before 1.0.1.32, EX6200v2 before 1.0.1.56, R7500v2 before 1.0.3.24, R7800 before 1.0.2.40, R9000 before 1.0.3.6, WN2000RPTv3 before 1.0.1.20, WN3000RPv3 before 1.0.2.52, WN3100RPv2 before 1.0.0.42, WNDR3700v4 before 1.0.2.92, WNDR4300 before 1.0.2.94, WNDR4300v2 before 1.0.0.50, WNDR4500v3 before 1.0.0.50, and WNR2000v5 before 1.0.0.62.

7.2 CVSS 3.1 High EPSS 1.4% · top 29.5% CWE-787 · Out-of-bounds write
7.2CVSS 3.1 base score, v2 6.5
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
13Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects D7800 before 1.0.1.28, EX2700 before 1.0.1.32, EX6200v2 before 1.0.1.56, R7500v2 before 1.0.3.24, R7800 before 1.0.2.40, R9000 before 1.0.3.6, WN2000RPTv3 before 1.0.1.20, WN3000RPv3 before 1.0.2.52, WN3100RPv2 before 1.0.0.42, WNDR3700v4 before 1.0.2.92, WNDR4300 before 1.0.2.94, WNDR4300v2 before 1.0.0.50, WNDR4500v3 before 1.0.0.50, and WNR2000v5 before 1.0.0.62.

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

Affected products

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

References

LinkTags
https://kb.netgear.com/000055177/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-Gateways-and-E Vendor Advisory
https://kb.netgear.com/000055177/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-Gateways-and-E 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-2018-21181), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.