CVE-2017-8218: TP-Link c20i Firmware

Critical severity, CVSS 9.8. EPSS: 2.1% chance of exploitation in the next 30 days.

vsftpd on TP-Link C2 and C20i devices through firmware 0.9.1 4.2 v0032.0 Build 160706 Rel.37961n has a backdoor admin account with the 1234 password, a backdoor guest account with the guest password, and a backdoor test account with the test password.

Affected products

• TP-Link c20i Firmware: up to and including 0.9.1_4.2_v0032.0_build_160706
• TP-Link c2 Firmware: up to and including 0.9.1_4.2_v0032.0_build_160706

Published 2017-04-25. Last modified 2026-06-17.