How severe is CVE-2020-35840?

CVE-2020-35840 has a CVSS 3.x base score of 6.9, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity high, and availability none.

Is CVE-2020-35840 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35840?

CVE-2020-35840 primarily affects Netgear D6200 Firmware. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-35840?

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

When was CVE-2020-35840 published?

CVE-2020-35840 was published on 2020-12-30 and last updated on 2026-06-17.

CVE-2020-35840

CVE-2020-35840 is a medium-severity vulnerability in Netgear D6200 Firmware with a CVSS 3.x base score of 6.9. 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 6.9)
CVSS v2: 3.5
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Netgear D6200 Firmware
Published: 2020-12-30
Last modified: 2026-06-17

Description

Certain NETGEAR devices are affected by stored XSS. This affects D6200 before 1.1.00.38, D7000 before 1.0.1.78, JNR1010v2 before 1.1.0.62, JR6150 before 1.0.1.24, JWNR2010v5 before 1.1.0.62, R6020 before 1.0.0.42, R6050 before 1.0.1.24, R6080 before 1.0.0.42, R6120 before 1.0.0.66, R6220 before 1.1.0.100, R6260 before 1.1.0.76, WNR1000v4 before 1.1.0.62, WNR2020 before 1.1.0.62, and WNR2050 before 1.1.0.62.

Frequently asked questions

What is CVE-2020-35840?: Certain NETGEAR devices are affected by stored XSS. This affects D6200 before 1.1.00.38, D7000 before 1.0.1.78, JNR1010v2 before 1.1.0.62, JR6150 before 1.0.1.24, JWNR2010v5 before 1.1.0.62, R6020 before 1.0.0.42, R6050 before 1.0.1.24, R6080 before 1.0.0.42, R6120 before 1.0.0.66, R6220 before 1.1.0.100, R6260 before 1.1.0.76, WNR1000v4 before 1.1.0.62, WNR2020 before 1.1.0.62, and WNR2050 before 1.1.0.62.
How severe is CVE-2020-35840?: CVE-2020-35840 has a CVSS 3.x base score of 6.9, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity high, and availability none.
Is CVE-2020-35840 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35840?: CVE-2020-35840 primarily affects Netgear D6200 Firmware. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-35840?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-35840 published?: CVE-2020-35840 was published on 2020-12-30 and last updated on 2026-06-17.

References

https://kb.netgear.com/000062711/Security-Advisory-for-Stored-Cross-Site-Scripting-on-Some-Routers-PSV-2019-0010

Affected products (14)

cpe:2.3:o:netgear:d6200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:d7000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:jnr1010v2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:jr6150_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:jwnr2010v5_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r6020_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r6050_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r6080_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r6120_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:r6260_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wnr1000v4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wnr2020_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:netgear:wnr2050_firmware:*:*:*:*:*:*:*:*

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