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CVE-2017-8218

31
FAUCET Score

CVE-2017-8218 describes a critical vulnerability affecting vsftpd on TP-Link C2 and C20i devices running firmware up to 0.9.1 4.2 v0032.0 Build 160706 Rel.37961n. This vulnerability involves multiple hardcoded backdoor accounts (admin/1234, guest/guest, test/test) that allow unauthorized access. With a CVSS score of 9.8 (CRITICAL), this flaw is easily exploitable over the network without authentication, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.9.1_4.2_v0032.0_build_160706CPE matchmatch criteria
cpe:2.3:o:tp-link:c2_firmware:*:rel.37961n:*:*:*:*:*:*
<= 0.9.1_4.2_v0032.0_build_160706CPE matchmatch criteria
cpe:2.3:o:tp-link:c20i_firmware:*:rel.37961n:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.02%
Probability of exploitation in next 30 days
EPSS Percentile
78.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0202 is in the 68th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

pierrekim.github.io / blog/2017-02-09-tplink-c2-and-c20i-vulnerable.html
ExploitTechnical DescriptionThird Party Advisory