How severe is CVE-2018-21226?

CVE-2018-21226 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-21226 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-21226?

CVE-2018-21226 primarily affects Netgear Jnr1010 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-21226?

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-2018-21226 published?

CVE-2018-21226 was published on 2020-04-28 and last updated on 2026-06-17.

CVE-2018-21226

CVE-2018-21226 is a high-severity vulnerability in Netgear Jnr1010 Firmware with a CVSS 3.x base score of 8.8. 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-269.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 5.8
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Netgear Jnr1010 Firmware
Published: 2020-04-28
Last modified: 2026-06-17

Description

Certain NETGEAR devices are affected by authentication bypass. This affects JNR1010v2 before 1.1.0.48, JWNR2010v5 before 1.1.0.48, WNR1000v4 before 1.1.0.48, WNR2020 before 1.1.0.48, and WNR2050 before 1.1.0.48.

Frequently asked questions

What is CVE-2018-21226?: Certain NETGEAR devices are affected by authentication bypass. This affects JNR1010v2 before 1.1.0.48, JWNR2010v5 before 1.1.0.48, WNR1000v4 before 1.1.0.48, WNR2020 before 1.1.0.48, and WNR2050 before 1.1.0.48.
How severe is CVE-2018-21226?: CVE-2018-21226 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-21226 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-21226?: CVE-2018-21226 primarily affects Netgear Jnr1010 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-21226?: 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-2018-21226 published?: CVE-2018-21226 was published on 2020-04-28 and last updated on 2026-06-17.

References

https://kb.netgear.com/000055110/Security-Advisory-for-Authentication-Bypass-on-Some-Routers-PSV-2017-0748

Affected products (5)

cpe:2.3:o:netgear:jnr1010_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:jwnr2010_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wnr1000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wnr2020_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wnr2050_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Netgear Jnr1010 Firmware

CVE-2016-11014 — Critical (CVSS 9.8): NETGEAR JNR1010 devices before 1.0.0.32 have Incorrect Access Control because the ok value of the auth cookie is a…
CVE-2018-21169 — High (CVSS 8.8): Certain NETGEAR devices are affected by incorrect configuration of security settings. This affects D7000 before…
CVE-2017-18703 — High (CVSS 8.8): Certain NETGEAR devices are affected by CSRF. This affects D1500 before 1.0.0.25, D500 before 1.0.0.25, D6100 before…
CVE-2017-18737 — High (CVSS 8.8): Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects JNR1010v2 before…
CVE-2017-18734 — High (CVSS 8.8): Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects JNR1010v2 before…
CVE-2017-18749 — High (CVSS 8.8): Certain NETGEAR devices are affected by CSRF. This affects JNR1010v2 before 1.1.0.44, JR6150 before 1.0.1.10,…

All CVEs affecting Netgear Jnr1010 Firmware →

Other CWE-269 (Improper Privilege Management) vulnerabilities

CVE-2026-31852 — Critical (CVSS 10.0): Jellyfin is an open-source media system. The code-quality.yml GitHub Actions workflow in jellyfin/jellyfin-ios is…
CVE-2025-20282 — Critical (CVSS 10.0): A vulnerability in an internal API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to…
CVE-2025-0505 — Critical (CVSS 10.0): On Arista CloudVision systems (virtual or physical on-premise deployments), Zero Touch Provisioning can be used to gain…
CVE-2023-48418 — Critical (CVSS 10.0): In checkDebuggingDisallowed of DeviceVersionFragment.java, there is a possible way to access adb before SUW…
CVE-2023-48419 — Critical (CVSS 10.0): An attacker in the wifi vicinity of a target Google Home can spy on the victim, resulting in Elevation of Privilege
CVE-2023-31273 — Critical (CVSS 10.0): Protection mechanism failure in some Intel DCM software before version 5.2 may allow an unauthenticated user to…

Browse all CWE-269 (Improper Privilege Management) vulnerabilities →