How severe is CVE-2018-21164?

CVE-2018-21164 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-21164 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-21164?

CVE-2018-21164 primarily affects Netgear R6220 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-21164?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-21164 published?

CVE-2018-21164 was published on 2020-04-23 and last updated on 2026-06-17.

CVE-2018-21164

CVE-2018-21164 is a high-severity vulnerability in Netgear R6220 Firmware with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Netgear R6220 Firmware
Published: 2020-04-23
Last modified: 2026-06-17

Description

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects R6220 before 1.1.0.64 and WNDR3700v5 before 1.1.0.54.

Frequently asked questions

What is CVE-2018-21164?: Certain NETGEAR devices are affected by command injection by an authenticated user. This affects R6220 before 1.1.0.64 and WNDR3700v5 before 1.1.0.54.
How severe is CVE-2018-21164?: CVE-2018-21164 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-21164 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-21164?: CVE-2018-21164 primarily affects Netgear R6220 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-21164?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-21164 published?: CVE-2018-21164 was published on 2020-04-23 and last updated on 2026-06-17.

References

https://kb.netgear.com/000055195/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-PSV-2017-3171

Affected products (2)

cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wndr3700_firmware:*:*:*:*:*:*:*:*

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