What is CVE-2017-8218?

CVE-2017-8218 is a critical-severity vulnerability in TP-Link C2, classified under Initialization of a Resource with an Insecure Default. CVSS score: 9.8/10. Published 2017-04-25.

How severe is CVE-2017-8218?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in TP-Link C2

CVE-2017-8218

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.

Published 2017-04-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.020 (80.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-1188 — Initialization of a Resource with an Insecure Default

References

pierrekim.github.io/blog/2017-02-09-tplink-c2-and-c20i-vulnerable.html (Technical Description, Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-8218?: CVE-2017-8218 is a critical-severity vulnerability in TP-Link C2, classified under Initialization of a Resource with an Insecure Default. CVSS score: 9.8/10. Published 2017-04-25.
How severe is CVE-2017-8218?: Critical severity. CVSS v3 base score is 9.8 out of 10.