How severe is CVE-2018-21161?

CVE-2018-21161 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-21161 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-21161?

CVE-2018-21161 primarily affects Netgear D7800 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-21161?

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

When was CVE-2018-21161 published?

CVE-2018-21161 was published on 2020-04-23 and last updated on 2026-06-17.

CVE-2018-21161

CVE-2018-21161 is a critical-severity vulnerability in Netgear D7800 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netgear D7800 Firmware
Published: 2020-04-23
Last modified: 2026-06-17

Description

Certain NETGEAR devices are affected by incorrect configuration of security settings. This affects D7800 before 1.0.1.34, R7800 before 1.0.2.46, and R9000 before 1.0.3.16.

Frequently asked questions

What is CVE-2018-21161?: Certain NETGEAR devices are affected by incorrect configuration of security settings. This affects D7800 before 1.0.1.34, R7800 before 1.0.2.46, and R9000 before 1.0.3.16.
How severe is CVE-2018-21161?: CVE-2018-21161 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-21161 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-21161?: CVE-2018-21161 primarily affects Netgear D7800 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-21161?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-21161 published?: CVE-2018-21161 was published on 2020-04-23 and last updated on 2026-06-17.

References

https://kb.netgear.com/000059469/Security-Advisory-for-Security-Misconfiguration-on-Some-Gateways-and-Routers-PSV-2017-0429

Affected products (3)

cpe:2.3:o:netgear:d7800_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r7800_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r9000_firmware:*:*:*:*:*:*:*:*

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