How severe is CVE-2018-21209?

CVE-2018-21209 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-21209 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-21209?

CVE-2018-21209 primarily affects Netgear Jnr1010 Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-21209?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-21209 published?

CVE-2018-21209 was published on 2020-04-28 and last updated on 2026-06-17.

CVE-2018-21209

CVE-2018-21209 is a medium-severity vulnerability in Netgear Jnr1010 Firmware with a CVSS 3.x base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Netgear Jnr1010 Firmware
Published: 2020-04-28
Last modified: 2026-06-17

Description

Certain NETGEAR devices are affected by reflected XSS. This affects JNR1010v2 before 1.1.0.46, JR6150 before 1.0.1.10, JWNR2010v5 before 1.1.0.46, PR2000 before 1.0.0.20, R6050 before 1.0.1.10, R6220 before 1.1.0.60, WNDR3700v5 before 1.1.0.50, WNR1000v4 before 1.1.0.46, WNR2020 before 1.1.0.46, and WNR2050 before 1.1.0.46.

Frequently asked questions

What is CVE-2018-21209?: Certain NETGEAR devices are affected by reflected XSS. This affects JNR1010v2 before 1.1.0.46, JR6150 before 1.0.1.10, JWNR2010v5 before 1.1.0.46, PR2000 before 1.0.0.20, R6050 before 1.0.1.10, R6220 before 1.1.0.60, WNDR3700v5 before 1.1.0.50, WNR1000v4 before 1.1.0.46, WNR2020 before 1.1.0.46, and WNR2050 before 1.1.0.46.
How severe is CVE-2018-21209?: CVE-2018-21209 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-21209 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-21209?: CVE-2018-21209 primarily affects Netgear Jnr1010 Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-21209?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-21209 published?: CVE-2018-21209 was published on 2020-04-28 and last updated on 2026-06-17.

References

https://kb.netgear.com/000055140/Security-Advisory-for-Reflected-Cross-Site-Scripting-on-Some-Routers-and-Extenders-PSV-2017-2514

Affected products (10)

cpe:2.3:o:netgear:jnr1010_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:jr6150_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:jwnr2010_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:pr2000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r6050_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wndr3700_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

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