HOMEVULNERABILITIESCVE-2017-8218
CRITICAL

CVE-2017-8218

CWE-1188Published: April 25, 2017· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2017-8218 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

tp-link4 product(s)
c2 firmwarec2c20i firmwarec20i
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
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Official Patches & Advisories

All References (2)

https://pierrekim.github.io/blog/2017-02-09-tplink-c2-and-c20i-vulnerable.htmlExploit · Technical Description · Third Party Advisory
https://pierrekim.github.io/blog/2017-02-09-tplink-c2-and-c20i-vulnerable.htmlExploit · Technical Description · Third Party Advisory

Quick Facts

CVE IDCVE-2017-8218
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-1188
CISA KEVNo
Affected1 vendor(s)
PublishedApr 25, 2017

Related CVEs (CWE-1188)

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2017-8218 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.