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CVE-2017-8220

52
FAUCET Score

CVE-2017-8220 is a critical remote code execution vulnerability affecting TP-Link C2 and C20i devices running firmware 0.9.1 4.2 v0032.0 Build 160706 Rel.37961n and earlier. An authenticated attacker can achieve remote code execution with a single HTTP request by injecting shell commands into the "host=" parameter within HTTP POST data. This vulnerability has a CVSS score of 9.9 (Critical) due to its network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation (not in KEV), the vulnerability has garnered significant community discussion, with 10 mentions, and its EPSS score is low, suggesting a low probability of exploitation.

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

9.9CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.1
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
36.59%
Probability of exploitation in next 30 days
EPSS Percentile
98.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.3659 is in the 98th percentile among its peer group of 1,124 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 1.0 Bluesky, 0.5 Mastodon, and 1.6 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