CVE-2021-43711: Totolink EX200 Firmware

Critical severity, CVSS 9.8. EPSS: 37.8% chance of exploitation in the next 30 days.

The downloadFlile.cgi binary file in TOTOLINK EX200 V4.0.3c.7646_B20201211 has a command injection vulnerability when receiving GET parameters. The parameter name can be constructed for unauthenticated command execution.

Affected products

• Totolink EX200 Firmware: version 4.0.3c.7646_b20201211 only

Published 2022-01-04. Last modified 2026-06-17.