CVE-2021-43661

Name: CVE-2021-43661
Creator: NVD / NIST
Published: 2022-03-31T00:15:07.947+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2021-43661 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. totolink EX300_v2 V4.0.3c.140_B20210429 was discovered to contain a reflected cross-site scripting (XSS) vulnerability via the component /home.asp.. EPSS estimates a 0.63% chance of exploitation in the next 30 days.

Description

totolink EX300_v2 V4.0.3c.140_B20210429 was discovered to contain a reflected cross-site scripting (XSS) vulnerability via the component /home.asp.

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

0.63%

45.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Totolink	Ex300 V2 Firmware	4.0.3c.140_b20210429

References

https://github.com/chibataiki/iot-vuls/blob/main/totolink/xss-vulnerability.mdExploit, Third Party Advisory
https://github.com/chibataiki/iot-vuls/blob/main/totolink/xss-vulnerability.mdExploit, Third Party Advisory

Timeline

Published: Mar 31, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43661?

totolink EX300_v2 V4.0.3c.140_B20210429 was discovered to contain a reflected cross-site scripting (XSS) vulnerability via the component /home.asp.

How severe is CVE-2021-43661?

CVE-2021-43661 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43661?

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-2021-43661?

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

Scan your code now

Source: NVD / NIST