CVE-2021-43663: Totolink EX300 v2 Firmware

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

totolink EX300_v2 V4.0.3c.140_B20210429 was discovered to contain a command injection vulnerability via the component cloudupdate_check.

Affected products

• Totolink EX300 v2 Firmware: version 4.0.3c.140_b20210429 only

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