CVE-2021-34220

Name: CVE-2021-34220
Creator: NVD / NIST
Published: 2021-08-20T17:15:07.563+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2021-34220 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.66%

46.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Totolink	A3002r Firmware	1.1.1-b20200824

References

https://github.com/pup2y/IoTVul/tree/main/TOTOLINK/A3002RExploit, Third Party Advisory
https://github.com/pup2y/IoTVul/tree/main/TOTOLINK/A3002RExploit, Third Party Advisory

Timeline

Published: Aug 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34220?

How severe is CVE-2021-34220?

CVE-2021-34220 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34220?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-34220?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST