CVE-2021-43662

Name: CVE-2021-43662
Creator: NVD / NIST
Published: 2022-03-31T00:15:07.987+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.54%

Last modified Jun 17, 2026

CVE-2021-43662 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. totolink EX300_v2, ver V4.0.3c.140_B20210429 and A720R ,ver V4.1.5cu.470_B20200911 have an issue which causes uncontrolled resource consumption.. EPSS estimates a 0.54% chance of exploitation in the next 30 days.

Description

totolink EX300_v2, ver V4.0.3c.140_B20210429 and A720R ,ver V4.1.5cu.470_B20200911 have an issue which causes uncontrolled resource consumption.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.54%

41.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Totolink	Ex300 V2 Firmware	4.0.3c.140_b20210429
Totolink	A720r Firmware	4.1.5cu.470_b20200911

References

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

Timeline

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

Frequently Asked Questions

What is CVE-2021-43662?

totolink EX300_v2, ver V4.0.3c.140_B20210429 and A720R ,ver V4.1.5cu.470_B20200911 have an issue which causes uncontrolled resource consumption.

How severe is CVE-2021-43662?

CVE-2021-43662 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43662?

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-2021-43662?

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

Scan your code now

Source: NVD / NIST