How severe is CVE-2021-34220?

CVE-2021-34220 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-34220 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-2021-34220?

CVE-2021-34220 affects Totolink A3002r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34220?

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

When was CVE-2021-34220 published?

CVE-2021-34220 was published on 2021-08-20 and last updated on 2026-06-17.

CVE-2021-34220

CVE-2021-34220 is a medium-severity vulnerability in Totolink A3002r Firmware with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Totolink A3002r Firmware
Published: 2021-08-20
Last modified: 2026-06-17

Description

Cross-site scripting in tr069config.htm in TOTOLINK A3002R version V1.1.1-B20200824 (Important Update, new UI) allows attackers to execute arbitrary JavaScript by modifying the "User Name" field or "Password" field.

Frequently asked questions

What is CVE-2021-34220?: Cross-site scripting in tr069config.htm in TOTOLINK A3002R version V1.1.1-B20200824 (Important Update, new UI) allows attackers to execute arbitrary JavaScript by modifying the "User Name" field or "Password" field.
How severe is CVE-2021-34220?: CVE-2021-34220 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-34220 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-2021-34220?: CVE-2021-34220 affects Totolink A3002r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34220?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-34220 published?: CVE-2021-34220 was published on 2021-08-20 and last updated on 2026-06-17.

References

https://github.com/pup2y/IoTVul/tree/main/TOTOLINK/A3002R

Affected products (1)

cpe:2.3:o:totolink:a3002r_firmware:1.1.1-b20200824:*:*:*:*:*:*:*

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