← Vulnerability feed

Vulnerability record · CVE-2018-21216 · published 28 April 2020

CVE-2018-21216: Netgear r6100 firmware classic buffer overflow vulnerability

Netgear · R6100 Firmware

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D3600 before 1.0.0.67, D6000 before 1.0.0.67, D6100 before 1.0.0.56, and R6100 before 1.0.1.20.

8.8 CVSS 3.1 High EPSS 0.73% · top 47.8% CWE-120 · Classic buffer overflow
8.8CVSS 3.1 base score, v2 5.8
0.73%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D3600 before 1.0.0.67, D6000 before 1.0.0.67, D6100 before 1.0.0.56, and R6100 before 1.0.1.20.

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

Affected products

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

References

LinkTags
https://kb.netgear.com/000055121/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-and-Gateways-P Vendor Advisory
https://kb.netgear.com/000055121/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-and-Gateways-P Vendor Advisory

Track CVE-2018-21216 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

9.8CVE-2016-10174NETGEAR router buffer overflow in hidden_lang_avi parameterThe NETGEAR WNR2000v5 router contains a buffer overflow in the hidden_lang_avi parameter when invoking the URL /apply.cgi?/lang_check.html. An unauth…KEVEPSS 83%analysed9.8CVE-2025-29044Netgear r6100 firmware classic buffer overflow vulnerabilityBuffer Overflow vulnerability in Netgear- R61 router V1.0.1.28 allows a remote attacker to execute arbitrary code via the QUERY_STRING key valueEPSS 1.1%9.8CVE-2020-35799Netgear d3600 firmware out-of-bounds write vulnerabilityCertain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects D3600 before 1.0.0.76, D6000 befor…EPSS 1.2%9.8CVE-2018-21153Netgear d7800 firmware classic buffer overflow vulnerabilityCertain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects D7800 before 1.0.1.34, DM200 before 1.0.0.50, …EPSS 1.6%9.8CVE-2018-21137Netgear d3600 firmware hard-coded credentials vulnerabilityCertain NETGEAR devices are affected by a hardcoded password. This affects D3600 before 1.0.0.76 and D6000 before 1.0.0.76.EPSS 1.4%9.8CVE-2019-20730Netgear d3600 firmware sql injection vulnerabilityCertain NETGEAR devices are affected by SQL injection. This affects D3600 before 1.0.0.68, D6000 before 1.0.0.68, D6200 before 1.1.00.28, D6220 befor…EPSS 0.91%9.4CVE-2020-35800Netgear ac2100 firmware vulnerabilityCertain NETGEAR devices are affected by incorrect configuration of security settings. This affects AC2100 before 1.2.0.72, AC2400 before 1.2.0.72, AC…EPSS 1.6%8.8CVE-2021-45641Netgear d3600 firmware vulnerabilityCertain NETGEAR devices are affected by incorrect configuration of security settings. This affects D3600 before 1.0.0.72, D6000 before 1.0.0.72, D620…EPSS 0.69%

Source: NIST National Vulnerability Database (record CVE-2018-21216), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.