CVE-2021-43662: Totolink a720r Firmware

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Totolink a720r Firmware: version 4.1.5cu.470_b20200911 only
• Totolink EX300 v2 Firmware: version 4.0.3c.140_b20210429 only

Published 2022-03-31. Last modified 2026-06-17.